A 3D anthropometry-based quantified comfort model for children's eyeglasses design.

Modeling the quantified relationships between anthropometric/product parameters and human perceptions provides research-driven guidelines for mass customization and personalization of ergonomic products. In particular, such models are critical for designing children's eyeglasses; however, they are still underexplored. This study examined children's comfort perceptions for eyeglasses with two variables (i.e., nose pads width and temple clamping force), and established quantified linkage models between subjective human perceptions and objective 3D anthropometric/product parameters. To the best of our knowledge, this is the first work to quantify these relationships for ergonomic eyeglasses design. A psychological experiment with thirty child participants was performed, and our analyses showed that two eyeglasses variables significantly influenced the children's comfort perceptions; static vs. dynamic conditions caused slight differences. The mathematical trendlines and trend surfaces established by our findings can estimate perceived component-specific and overall comfort scores based on 3D anthropometric/product parameters. This also allows for calculation of parameter's allowances for sizing and grading eyeglasses while maintaining satisfactory comfort.

Social Perceptions of Pediatric Hearing Aids.

OBJECTIVES: To determine whether hearing aid (HA) use affects social perceptions of general public adults and age-matched peers and if so, determine if effects are modulated by lack of societal representation of pediatric HAs. METHODS: A 10-year-old boy was presented in six photographic conditions with and without HAs and eyeglasses (a worn sensory aid with wider societal representation). HAs were presented in neutral skin tone and bright blue colors. Photographic conditions were embedded into web-based surveys with visual analog scales to capture social perceptions data and sourced to 206 adults (age 18-65) and 202 peers (age 10) with demographic characteristics representative of the general US population. Mean differences in scores for each condition compared to control images were computed using two-tailed t-tests. RESULTS: In both adult and child respondents, HAs were associated with decreased athleticism, confidence, health, leadership, and popularity. Glasses were associated with decreased athleticism and popularity but increased intelligence, overall success, and in the child respondents, friendliness. When worn in combination, the beneficial effects of glasses were mitigated by brightly colored but not neutrally colored HAs. CONCLUSION: Negative effects of pediatric HAs on social perceptions may be influenced by poor societal representation of HAs. These results suggest that greater representation of pediatric HAs is necessary to make society more inclusive for children with hearing loss. LEVEL OF EVIDENCE: 4 Laryngoscope, 131:E2387-E2392, 2021.

Blue-blocking glasses as additive treatment for mania: Effects on actigraphy-derived sleep parameters.

Improvement of sleep is a central treatment goal for patients in a manic state. Blue-blocking (BB) glasses as adjunctive treatment hasten overall recovery from mania. This method is an evolvement from dark therapy and builds on the discovery of the blue-light-sensitive retinal ganglion cell that signals daytime to the brain. We report effects of adjunctive BB glasses on actigraphy-derived sleep parameters for manic inpatients as compared to placebo. Hospitalized patients with bipolar disorder in a manic state aged 18-70 years were recruited from five clinics in Norway from February 2012 to February 2015. The participants were randomly allocated to wearing BB glasses or placebo (clear glasses) as an adjunctive treatment from 18:00 to 08:00 hours for seven consecutive nights. Sleep and wake were monitored by actigraphy. From 32 eligible patients, 10 patients in each group qualified for the group analyses. The BB group's mean sleep efficiency was significantly higher at night 5 as compared to the placebo group (92.6% vs. 83.1%, p = .027). The 95% confidence interval (CI) was 89.4%-95.8% in the BB group and 75.9%-90.3% in the placebo group. There were fewer nights of interrupted sleep in the BB group: 29.6% versus 43.8% in the placebo group. The BB group received less-intensive sleep-promoting pharmacological treatment and showed significantly higher sleep efficiency and more consolidated sleep as compared to the placebo group. Our findings suggest sleep-promoting effects through deactivating mechanisms. Adjunctive BB glasses seem to be useful for improving sleep for manic patients in the hospital setting.

An evaluation for VR glasses system user experience: The influence factors of interactive operation and motion sickness.

As a new type of Virtual Reality (VR) headset, VR glasses rise rapidly in a number of areas. It's essential to understand the importance of user experience (UX) on VR glasses design. This study aimed to develop questionnaires for evaluating VR glasses' UX, as well as to investigate the relationship between various UX variables. With using lab-based usability tests, this study analyzed participants' self-reports and performance based on testing eight VR glasses and seven mobile applications. A nine-item questionnaire and a ten-item questionnaire were successfully developed to measure VR glasses systems' UX quality in terms of hardware and application, respectively. Within a proposed UX evaluation framework, the perceived UX quality relative to VR glasses hardware emerged as a core predictor in predicting interactive operation performance, whereas the application UX perception was a significant predictor of motion sickness.

Impact of a Local Vision Care Center on Glasses Ownership and Wearing Behavior in Northwestern Rural China: A Cluster-Randomized Controlled Trial.

Visual impairment is common among rural Chinese children, but fewer than a quarter of children who need glasses actually own and use them. To study the effect of rural county hospital vision centers (VC) on self-reported glasses ownership and wearing behavior (primary outcome) among rural children in China, we conducted a cluster-randomized controlled trial at a VC in the government hospital of Qinan County, a nationally-designated poor county. All rural primary schools (n = 164) in the county were invited to participate. Schools were randomly assigned to either the treatment group to receive free vision care and eyeglasses, if needed, or control group, who received glasses only at the end of the study. Among 2806 eligible children with visiual impairment (visual acuity ≤ 6/12 in either eye), 93 (3.31%) were lost to follow-up, leaving 2713 students (45.0% boys). Among these, glasses ownership at the end of the school year was 68.6% among 1252 treatment group students (82 schools), and 26.4% (p < 0.01) among 1461 controls (82 schools). The rate of wearing glasses was 55.2% in the treatment group and 23.4% (p < 0.01) among the control group. In logistic regression models, treatment group membership was significantly associated with spectacle ownership (Odds Ratio [OR] = 11.9, p < 0.001) and wearing behavior (OR = 7.2, p < 0.001). County hospital-based vision centers appear effective in delivering childrens' glasses in rural China.

Qualidade de vida e visão pós-facectomia / Quality of life and vision post-facectomy

Resumo Objetivo: A catarata é a principal causa de cegueira reversível no mundo e seu tratamento é baseado em cirurgia, facectomia. A evolução do procedimento tem se baseado em vários pilares, mas é no desenvolvimento de novos tipos de lentes intraoculares que vem mostrando inovações consideráveis. As lentes atuais são capazes, além de tratar a catarata, de corrigir erros refracionais. O objetivo deste estudo foi avaliar a qualidade de vida e de visão pós-facectomia, comparando as lentes multifocais (Restor), tóricas, monofocais esféricas (SN60AT) e monofocais asféricas. Métodos: A pesquisa abrangeu 54 pacientes submetidos a facectomia com implantação de uma das lentes há, pelo menos, 3 meses. Os pacientes responderam questionário de qualidade de vida Cataract TyPE Specification sobre satisfação de visão, dependência de óculos para diversas atividades diárias e presença de fenômenos disfóticos. Para análise dos dados foram utilizados os testes de Kolmogorov-Smirnov, quanto a normalidade e ANOVA com teste de Tukey, quanta parametria. Em comparações não paramétricas, utilizou-se o teste de Mann-Whitney. Em todas as análises foi usado o mesmo nível de significância (p<0,05). Resultados: Numa escala de 0 a 10, a pesquisa mostrou que as lentes SN60AT, esféricas monofocais, foram as que obtiveram menor nível de satisfação entre as 4 lentes, obtendo média de 8,7 (DP= 1,30; IC ± 0,655), seguido das esféricas monofocais (média= 8,3 - DP= 1,83; IC ± 0,927), das esféricas multifocais (Restor) (média = 8,9 - DP = 1,42; IC ± 0,721) e as tóricas (média = 9,1 - DP = 1,67; IC ± 0,844) como a de maior nível de satisfação. Em relação à dependência dos óculos, a lente Restor foi a que mostrou melhor desempenho, com menor dependência dos óculos. Fenômenos disfóticos foram mais frequentes nos pacientes que tiveram implantada a lente SN60AT seguida de lente Restor. Conclusão: Conclui-se que as lentes SN60AT foram as lentes que causaram menor grau de satisfação, tendo os fenômenos disfóticos umas das principais queixas, associada a dependência dos óculos pós-cirurgia. Os pacientes que tiveram as lentes Restor implantadas, apesar dos sintomas disfóticos mais presentes do que as lentes monofocais tóricas e monofocais esféricas, tem o mesmo nível de satisfação, e ainda proporciona maior independência dos óculos.

Abstract Objective: Cataract is the leading cause of reversible blindness in the world and its treatment is based on surgery, facectomy. The evolution of the procedure has been based on several pillars, but it is in the development of new types of intraocular lenses that has been showing considerable innovations. Current lenses are capable, in addition to treating cataracts, of correcting refractive errors. The aim of this study was to evaluate the quality of life and post-facectomy vision, comparing multifocal lenses (Restor), toric, spherical monofocals (SN60AT) and aspheric monofocals. Methods: The study included 54 patients undergoing a facectomy with implantation of one of the lenses for at least 3 months. The patients answered questionnaire quality of life Cataract TyPE Specification on vision satisfaction, glasses dependence for various daily activities and presence of dysphothetic phenomena. For the analysis of the data, the Kolmogorov-Smirnov tests were used, regarding normality and ANOVA with Tukey's test, how much parametric. In non-parametric comparisons, the Mann-Whitney test was used. In all analyzes, the same level of significance was used (p <0.05). Results: On a scale of 0 to 10, the research showed that single-spherical spherical SN60AT lenses were the ones that obtained the lowest level of satisfaction among the four lenses, obtaining an average of 8.7 (SD = 1.30, CI ± 0.655), followed (mean = 8.9 - SD = 1.42, CI ± 0.721) and the toric (mean = 8.3 - SD = 1.83, CI ± 0.927), multifocal spherical (Restor) 9.1 - SD = 1.67, CI ± 0.844) as the highest level of satisfaction. Regarding the dependence of the glasses, the Restor lens showed the best performance, with less dependence on the glasses. Dysphasic phenomena were more frequent in patients who had implanted the SN60AT lens followed by Restor lens. Conclusion: It is concluded that the SN60AT lenses were the lenses that caused less satisfaction, and the dysphothetic phenomena were one of the main complaints, associated with the postoperative glasses dependence. Patients who had restored Restor lenses, despite the more present dysphoric symptoms than spherical monofocal and single-focal lenses, have the same level of satisfaction, and still provide greater independence of the glasses.

Pattern and Prevalence of Refractive Error and Secondary Visual Impairment in Patients Attending a Tertiary Hospital in Dhulikhel, Nepal.

Background Uncorrected refractive error is one of the most important causes of visual impairment worldwide. Objective To ascertain the pattern and prevalence of refractive error and secondary visual impairment in subjects attending Ophthalmology department. Method A prospective hospital-based study was designed where presenting visual acuity, age of presentation, refractive status, best corrected visual acuity and status of visual impairment were assessed in participants, ages ranging from 3-39 years presenting to the Ophthalmology department of Dhulikhel Hospital, Kathmandu University Hospital. History of use of spectacle was noted and participants were categorized into different visual impairment categories as per their presenting visual acuity. Result Out of a total of 4500 total clients examined during the study period, 388 (8.62%) had refractive error where 219 (56.44%) were females and 169 (43.56%) were males. Mean age at presentation was 22.70±7.69 years (range, 3-39 years). Astigmatism was the most common subtype seen in 373 eyes (48.06%), followed by myopia (366 eyes, 47.16%) and hypermetropia (31 eyes, 4.0%). Only 40.50% subjects who required refractive correction were using spectacle. 62.37% (242 clients) had some of visual impairment during their presentation. There was statistically significant improvement in visual acuity after refractive correction (p=0.00). Conclusion Uncorrected refractive error is one of the most important causes of visual impairment. Lack of awareness, infrequent ocular examination and lack of community or preschool vision screening were the main causes for the late presentation and significant visual impairment associated with the condition. Social stigma, economical limitation and negative counseling and attitudes about spectacle wear were primary factors behind the unsatisfactory spectacle use.

Impact of Free Glasses and a Teacher Incentive on Children's Use of Eyeglasses: A Cluster-Randomized Controlled Trial.

PURPOSE: To study the effect of free glasses combined with teacher incentives on in-school glasses wear among Chinese urban migrant children. DESIGN: Cluster-randomized controlled trial. METHODS: Children with visual acuity (VA) ≤6/12 in either eye owing to refractive error in 94 randomly chosen primary schools underwent randomization by school to receive free glasses, education on their use, and a teacher incentive (Intervention), or glasses prescriptions only (Control). Intervention group teachers received a tablet computer if ≥80% of children given glasses wore them during unannounced visits 6 weeks and 6 months (main outcome) after intervention. RESULTS: Among 4376 children, 728 (16.7%, mean age 10.9 years, 51.0% boys) met enrollment criteria and were randomly allocated, 358 (49.2%, 47 schools) to Intervention and 370 (50.8%, 47 schools) to Control. Among these, 693 children (95.2%) completed the study and underwent analysis. Spectacle wear was significantly higher at 6 months among Intervention children (Observed [main outcome]: 68.3% vs 23.9%, adjusted odds ratio [OR] = 11.5, 95% confidence interval [CI] 5.91-22.5, P < .001; Self-reported: 90.6% vs 32.1%, OR = 43.7, 95% CI = 21.7-88.5, P < .001). Other predictors of observed wear at 6 months included baseline spectacle wear (P < .001), uncorrected VA <6/18 (P = .01), and parental spectacle wear (P = .02). The 6-month observed wear rate was only 41% among similar-aged children provided free glasses in our previous trial without teacher incentives. CONCLUSIONS: Free spectacles and teacher incentives maintain classroom wear in the large majority of children needing glasses over a school year. Low wear among Control children demonstrates the need for interventions.

Use of eyeglasses among children in elementary school: perceptions, behaviors, and interventions discussed by parents, school nurses, and teachers during focus groups.

PURPOSE: To investigate the perceptions, behaviors, and recommendations that parents, school nurses, and teachers have regarding children's use of eyeglasses. APPROACH: Focus groups with parents, school nurses, and teachers were conducted. SETTING: The study took place in one Southern California school district. PARTICIPANTS: There were 39 participants, including 24 parents, seven school nurses, and eight teachers. METHOD: An experienced moderator guided the focus group discussions. Transcripts were analyzed using grounded theory techniques. RESULTS: Participants perceive visual impairment as a serious problem in the development of children. The lack of eyeglasses may lead to problems such as tiredness, headaches, inability to focus on school work, and decreased reading speed. Participants experienced disappointment, unhappiness, worry, and concern when they realized they needed eyeglasses at a young age. Negative societal perceptions toward eyeglasses, lack of eye doctors in minority communities, parental perceptions that children do not need eyeglasses, and peer bullying of children wearing eyeglasses are key obstacles to children's use of eyeglasses. Participants suggest school and national campaigns featuring respected public figures who wear eyeglasses to promote positive attitudes toward eyeglasses. CONCLUSION: Parents and teachers who closely follow the academic development of children have observed that visual impairment has negative consequences for the scholastic achievement of children. They recommend interventions to promote the attractiveness of eyeglasses in society. The participants discuss the need for a national preventative message for eye care similar to the message for dental care. The public health message should emphasize the importance of embracing and respecting differences among individuals.

Attitude and beliefs of Nigerian undergraduates to spectacle wear.

BACKGROUND: Uncorrected refractive error is a common cause of preventable visual impairment. Glasses are the cheapest and commonest form of correction of refractive errors. To achieve this, patients must exhibit good compliance to spectacle wear. Patients' attitude and perception of glasses and eye health could affect compliance to spectacle wear. OBJECTIVE: To determine the attitude and beliefs of Nigerian undergraduates to spectacle wear. METHOD: A cross sectional study of 500 undergraduates of the University of Benin, Nigeria. Age range was from 18 to 30 years, mean age 23 ± 2.7 years. There were 269 males and 231 females. Semi structured questionnaires were distributed to the participants and collected same day after completion. RESULTS: Two-thirds (68%) of the total population studied had not heard of refractive error. About a third (38%) believed wearing eyeglasses was one of the methods used to correct refractive error. Half (50%) believed they would wear spectacles if prescribed with one by their doctor. Sixty-four percent believed eyeglasses are harmful to the eyes; and 65% did not know that eyeglasses could be used to relieve other forms of ocular discomfort like headache and tearing. Fifty-seven per cent of respondents saw people who wore eyeglasses as visually handicapped, while 60% believed that eyeglasses were meant for old people. Majority of the respondents (56%) believed that they would be teased if they wore glasses. CONCLUSION: Knowledge of refractive errors and acceptance of glasses for the correction of refractive errors among Nigerian undergraduates is not encouraging. Public enlightenment programs to promote benefits of wearing prescribed spectacles are needed.

Perceptions of glasses as a health care product: a pilot study of New Zealand baby boomers.

Marketers have been slow to customize their strategies for the influential consumer segment of aging baby boomers. This qualitative research provides insights on New Zealand baby boomers' perceptions of glasses as a health care product. Appearance was a dominant theme; status was not a major concern, although style and fashion were. Wearing glasses had negative associations related to aging; however, both male and female participants recognized that glasses offered improved quality of life. Data relating to the theme of expense indicated that these New Zealand baby boomers made sophisticated perceptual associations and subsequent pragmatic trade-offs between price, quality, and style.

Personalizing of spectacles.

Spectacles are vital for correcting vision. Individuals who need vision correction can choose to wear spectacles or contact lenses. Alternatively, they may choose to have a vision-correcting operation. Therefore, researchers focus on vision science and spectacle design. Although some studies have compared spectacles and contact lenses for better visual quality, there is no consensus regarding which are better for the correction of vision. With the development of technology and the improvement of living standards, the design and production of spectacles will focus on personalized style, lenses, and frames. In this paper, we introduced trends in spectacles and studies of the relationship between frame sizes and face sizes, attempting to provide a feasible program for the personalization of spectacles-the Personalized Spectacles Program. Furthermore, certain limitations, such as non-personalized and misused spectacles, which have elevated the importance of the design and production of personalized spectacles were discussed.

The effect of real and virtual visual cues on walking in Parkinson's disease.

Patients with Parkinson's disease (PwPD) have a slow, shuffling gait, marked by sporadic freezing of gait (FoG) during which effective stepping ceases temporarily. As these gait problems are not commonly improved by medical and surgical treatments, alternative approaches to manage these problems have been adopted. The aim of this study was to evaluate the effect of real and virtual visual cues on walking in PD. We assessed 26 mid-stage PwPD, on and off medication, on a laboratory-based walking task which simulated real world challenges by incorporating FoG triggers and using appropriate placebo conditions. Cueing interventions were presented via virtual reality glasses (VRG rhythmic, visual flow and static placebo cues), and as transverse lines (TL) on the walkway. Objective measures of gait (task completion time; velocity, cadence, stride length; FoG frequency) and self-rated fear of falling (FoF) were recorded. Cueing intervention affected task completion time only off medication. Whereas placebo VRG cues provided no improvement in walking, visual flow VRG cues marginally reduced the task completion time. TL on the floor elicited more substantial improvements in gait with reduced cadence, increased stride length and reduced FoG frequency. VRG rhythmic cueing impaired overall walking. Notably, a final no-intervention condition yielded quicker task completion, greater walking velocity, increased stride length and less frequent FoG. Although the VRG produced modest improvements only in the visual flow condition, their flexibility is an advantage. These results endorse the use of TL and justify further testing and customisation of VRG cues for individual PwPD.

Economics and attitudes regarding spectacles in daily life: a European perspective.

PURPOSE: The objectives of this survey were to collect data from five European countries (France, Germany, Italy, Spain, and the United Kingdom) on the societal costs of spectacle dependence and respondents' willingness to pay (WTP) for freedom from spectacles. METHODS: Samples of citizens age >or=45 years and currently wearing spectacles were selected according to a quota method (age, gender, occupation) and interviewed (22 questions) using a Computer-Assisted Telephone Interviewing system. RESULTS: In total, 4,157 respondents were interviewed across the 5 countries; 38.4% were age >or=65 years and 55.8% female. Most prescribed lenses were monofocal (49.7-72.8%) in all countries, except in France (29.8%). The most frequent replacement interval (70.4%) was >or=2 years and the average cost was > euro 145 per pair (62.9%). Replacements were most frequent in the UK and expenditure was highest in France. The three most common everyday tasks requiring spectacles were reading (60.4%), watching TV (33.6%) and shopping (28.8%). Willingness to pay varied across countries, the UK subjects expressing the lowest values; this was especially true for men and persons aged < 64 years. CONCLUSION: Respondents in France bought mostly expensive spectacles while Italians acquired the least expensive eyeglasses. The spectacle frequency of replacement rate is inversely related to prices. About half of all respondents expressed a WTP, at least partially, for freedom from spectacles.

Randomized trial of the effect of contact lens wear on self-perception in children.

PURPOSE: To determine whether contact lens wear affects children's self-perceptions. METHODS: The Adolescent and Child Health Initiative to Encourage Vision Empowerment Study was a randomized, single-masked trial conducted at five clinical centers in the United States. Subjects were 8- to 11-year-old myopic children randomly assigned to wear spectacles (n = 237) or soft contact lenses (n = 247) for 3 years. The primary endpoint was the Self-Perception Profile for Children Global Self-Worth scale. Secondary outcomes included the Physical Appearance, Athletic Competence, Scholastic Competence, Behavioral Conduct, and Social Acceptance Self-Perception Profile for Children scales. RESULTS: Global self-worth was not affected by contact lens wear [analysis of variance (ANOVA), difference = 0.06; 95% CI, -0.004 to 0.117]. Physical appearance (ANOVA, difference = 0.15; 95% CI, 0.07 to 0.22), athletic competence (ANOVA, difference = 0.08; 95% CI, 0.01 to 0.15), and social acceptance (ANOVA, difference = 0.10; 95% CI, 0.03 to 0.17) were all greater for contact lens wearers. CONCLUSIONS: Although contact lens wear does not affect global self-perceptions of 8- to 11-year-old myopic children their physical appearance, athletic competence, and social acceptance self-perceptions are likely to improve with contact lens wear. Eye care practitioners should consider the social and visual benefits of contact lens wear when choosing the most appropriate vision correction modality for children as young as 8 years of age.

What do kids think about kids in eyeglasses?

PURPOSE: Previous studies have examined how people feel about others who wear glasses, but no studies of children have been published on the subject. We conducted the Children's Attitudes about Kids in Eyeglasses (CAKE) study to determine how children feel about other children who wear glasses. METHODS: Subjects compared a series of 24 picture pairs and answered six questions regarding which child ...he or she would rather play with, looks better at playing sports, appears smarter (more intelligent), appears nicer, looks more shy and looks more honest. The children in each pair of pictures differed by gender, ethnicity and spectacle wear. Logistic regression was performed to determine the probability and confidence interval that a subject would pick a particular child. RESULTS: Eighty subjects between the ages of 6 and 10 years participated. The average (+/-SD) age of the subjects was 8.3 +/- 1.3 years, 42 (53%) were females, 51 (64%) were whites, 21 (26%) were blacks, and 30 (38%) wore glasses. The spectacle wearer appeared smarter (0.66, CI = 0.60-0.71) and more honest (0.57, CI = 0.50-0.64), and children who wore glasses looked smarter regardless of whether the child picking wore glasses. Both boys (0.66, CI = 0.68-0.79) and girls (0.77, CI = 0.71-0.82) thought that boys looked better at playing sports. DISCUSSION: The old adage 'Boys never make passes at lasses who wear glasses' may be outmoded, but glasses may tend to make children look smarter and slightly more honest to their peers.

The "sunglasses sign" predicts nonorganic visual loss in neuro-ophthalmologic practice.

OBJECTIVE: The aim of our study was to evaluate whether wearing sunglasses (the "sunglasses sign") can be used by neuro-ophthalmologists to predict nonorganic visual loss (NOVL) in their patients. METHODS: We prospectively collected information on all new patients seen by us over 13 months. We included all patients who ultimately received a diagnosis of NOVL, and all patients wearing sunglasses in our clinic. We recorded demographics, iris color, number of positive review of systems, ocular examination, precipitating event or trauma, workers' compensation claims, disability and lawsuit related to the visual loss, and the reason for wearing sunglasses. RESULTS: Among the 1,377 consecutive new patients seen in our clinic during the study, 34 patients wore sunglasses, among whom 7 (20.6%) had organic visual loss. During the study period, 59 patients were diagnosed with NOVL, among whom 27 (45.8%) wore sunglasses. The sensitivity of wearing sunglasses for NOVL was 0.46 (95% CI 0.33 to 0.59). The probability that a patient walking into our clinic had NOVL was 0.043 (95% CI 0.033 to 0.055); it increased to 0.79 (95% CI 0.62 to 0.91) in sunglasses patients. The specificity of sunglasses for the diagnosis of NOVL was 0.995 (95% CI 0.989 to 0.998). At least one of the following characteristics (highly positive review of systems, workers' compensation claim, disability, and lawsuit) was found in 26 of 27 (96.3%) of NOVL patients wearing sunglasses and in none of the sunglasses patients with organic neuro-ophthalmic disorders. All 7 sunglasses patients with organic neuro-ophthalmic disorders had reasonable ophthalmic explanations for wearing sunglasses. CONCLUSION: The "sunglasses sign" in a patient without an obvious ophthalmic reason to wear sunglasses is highly suggestive of nonorganic visual loss.

Do tinted spectacle lens wearers have a different personality?

The wearing of tinted spectacle lenses is considered by some health care workers to be a marker of psychopathology or a hypochondriacal personality type. The purpose of this study was to determine whether there is a relationship between the wearing of tinted spectacle lenses and personality type in physically healthy subjects. The Sixteen Personality Factor Questionnaire 5th Edition, a multidimensional standardized self-report inventory, was used to determine the personality type of 98 participants. Twenty currently wore tinted spectacle lenses for reasons other than ocular disease, sun protection, outdoor or indoor glare reduction, pattern sensitive epilepsy, migraines, reading difficulties or fashion. The remainder did not wear tinted spectacle lenses for any purpose other than sun protection. Tinted lens wear and no tinted lens wear groups were age and gender matched. There was no statistically significant difference in five global personality factors between the no-tint and tint groups: extraversion (p = 0.31), anxiety (p = 0.75), tough-mindedness (p = 0.96), independence (p = 0.63), and self-control (p = 0.87). This suggests that the use of tinted lenses by physically healthy people is unlikely to be an indicator of personality type.