Trachoma in the Pacific Islands: evidence from Trachoma Rapid Assessment.

AIMS: To establish the presence or absence of trachoma in the Pacific Island region. METHODS: Trachoma Rapid Assessment methodology was used in Kiribati, Nauru, Vanuatu, Solomon Islands and Fiji. Advised by key informants, high-risk communities were chosen from each country. All available children aged 1-9 years and adults > or = 40 years were examined. RESULTS: A total of 903 adults > or = 40 years and 3102 children aged 1-9 years were screened at 67 sites. Rates of active trachoma in children were >15% in all sites in Kiribati and >20% in all sites in Nauru. However, there was a high variability of rates of active trachoma in survey sites in Vanuatu, Solomon Islands and Fiji with rates ranging from 0% to 43% (average 23.3%), 6.0% to 51.9% (average 30.5%) and 0% to 48.8% (average 22.1%) respectively. Average rates of scarring trachoma in adults were 61.9% in Kiribati, 12.5% in Nauru, 38.2% in Vanuatu, 67.0% in the Solomon Islands and 18.8% in Fiji. Rates of trichiasis and trichiasis surgeries suggest the possibility of blinding trachoma in the region. CONCLUSION: The findings indicate that trachoma is present in all the Pacific Island countries screened. Further prevalence studies are required, and trachoma control measures should be considered.

Predicting the need for low vision rehabilitation services.

AIMS: To determine the independent predictors of rehabilitation needs for people with low vision using the Impact of Vision Impairment questionnaire (IVI) to measure the quality-of-life consequences of vision-specific restrictions on participation in activities of daily living. METHODS: Patients attending low vision clinics completed the IVI and provided personal and clinical information such as co-morbidities and visual acuity. Rasch analysis was used to generate person measures for the IVI total and three domain scores. Rehabilitation needs were based on "mild", "moderate" or "severe" levels of restriction in participation as determined by the lower, moderate and higher tertiles of persons measures. Logistic regression analyses were used to determine independent predictors of rehabilitation needs. RESULTS: 477 patients (56% women) with a mean age 72 years (SD 15.3) were recruited. Most (74%) had moderate or severe vision loss (presenting visual acuity (VA)<6/18), and 43% had age-related macular degeneration (AMD). Females, shorter duration of vision impairment, having AMD, worse VA, a greater impact of co-morbidities on daily living and reliance on family or friends were univariately associated with poorer IVI scores (p<0.05). In all regression models, VA, the impact of comorbidities on daily living and dependence on family/friends emerged as the three strongest independent predictors of rehabilitation needs. CONCLUSION: In addition to vision, clinicians also need to consider issues relating to dependency when assessing rehabilitation needs. A more holistic approach to patient referral and rehabilitation provision is therefore warranted.

Self-management programs for adults with low vision: needs and challenges.

OBJECTIVE: To explore the needs of individuals with low vision in order to inform the contents of a low vision self-management (SM) program and determine potential barriers to participation. METHODS: Semi-structured interviews were conducted with 48 participants with low vision resulting different from eye conditions. Qualitative analysis was conducted in order to identify major themes. RESULTS: All participants described a range of consequences as a result of vision loss including difficulties with functional activities, social interaction and emotional distress. Less than half were interested in attending a SM program. Barriers included practical reasons as well as a perceived lack of need and unclear or negative perceptions of such a program. CONCLUSION: SM programs for low vision are a promising way to help address the range of difficulties experienced by this population if barriers to participation can be overcome. PRACTICE IMPLICATIONS: SM programs should include vision-specific strategies, training in generic problem-solving and goal setting skills and how to cope with emotional reactions to vision impairment. Programs should be delivered and promoted in such a way to enhance access and encourage uptake by those with a range of vision loss in the community.

Comparative study of the polaroid and digital non-mydriatic cameras in the detection of referrable diabetic retinopathy in Australia.

AIM: To show that the non-mydriatic retinal camera (NMRC) using polaroid film is as effective as the NMRC using digital imaging in detecting referrable retinopathy. METHODS: A series of patients with diabetes attending the eye out-patients department at the Royal Victorian Eye and Ear Hospital had single-field non-mydriatic fundus photographs taken using first a digital and then a polaroid camera. Dilated 30 degrees seven-field stereo fundus photographs were then taken of each eye as the gold standard. The photographs were graded in a masked fashion. Retinopathy levels were defined using the simplified Wisconsin Grading system. We used the kappa statistics for inter-reader and intrareader agreement and the generalized linear model to derive the odds ratio. RESULTS: There were 196 participants giving 325 undilated retinal photographs. Of these participants 111 (57%) were males. The mean age of the patients was 68.8 years. There were 298 eyes with all three sets of photographs from 154 patients. The digital NMRC had a sensitivity of 86.2%[95% confidence interval (CI) 65.8, 95.3], whilst the polaroid NMRC had a sensitivity of 84.1% (95% CI 65.5, 93.7). The specificities of the two cameras were identical at 71.2% (95% CI 58.8, 81.1). There was no difference in the ability of the polaroid and digital camera to detect referrable retinopathy (odds ratio 1.06, 95% CI 0.80, 1.40, P = 0.68). CONCLUSION: This study suggests that non-mydriatic retinal photography using polaroid film is as effective as digital imaging in the detection of referrable retinopathy in countries such as the USA and Australia or others that use the same criterion for referral.

Impact of age related macular degeneration on quality of life.

AIMS: To describe the impact of age related macular degeneration (AMD) on quality of life and explore the association with vision, health, and demographic variables. METHODS: Adult participants diagnosed with AMD and with impaired vision (visual acuity <6/12) were assessed with the Impact of Vision Impairment (IVI) questionnaire. Participants rated the extent that vision restricted participation in activities affecting quality of life and completed the Short Form General Health Survey (SF-12) and a sociodemographic questionnaire. RESULTS: The mean age of the 106 participants (66% female) was 83.6 years (range 64-98). One quarter had mild vision impairment, (VA<6/12-6/18) and 75% had moderate or severely impaired vision. Participants reported from at least "a little" concern on 23 of the 32 IVI items including reading, emotional health, mobility, and participation in relevant activities. Those with mild and moderate vision impairment were similarly affected but significantly different from those with severe vision loss (p<0.05). Distance vision was associated with IVI scores but not age, sex, or duration of vision loss. CONCLUSION: AMD affects many quality of life related activities and not just those related to reading. Referral to low vision care services should be considered for people with mild vision loss and worse.

The reliability of data collection periods of personal costs associated with vision impairment.

PURPOSE: To determine the reliability of vision-related personal costs collected over 1, 3 and 6 months (extrapolated to 12 months) compared to one-year data. METHODS: Participants of any age, with a presenting visual acuity of < 20/40 in the better eye and an ability to converse in English, were recruited. Monthly cost diaries, in large print and electronic copies with instructions available in audio and Braille, were used prospectively to collect personal costs. The personal expenses were grouped under four categories, namely: (a) medicines, products and equipment, (b) health and community services, (c) informal care and support and (d) other expenses. Sociodemographic and clinical data were also collected. RESULTS: 104 participants (59 females) with a mean age of 64 years completed the 12-months diaries. Almost 40% of the participants had severe visual impairment (< 20/200) in the better eye and the most common cause of vision loss was AMD (n=40; 38%). The mean total personal costs collected from the 12-months diaries were 3,330+/-2,887 AUS dollars. There were no significant differences between the 12-months data and extrapolated 1, 3 and 6-months diaries (t-tests; p=0.17, 0.89 and 0.73, respectively). However, the 1-month variation was substantially larger (SD+/-5,860) compared to the 3-month and 6-month variances (SD+/-3,037 and 3,030, respectively) for total costs. Also, compared to the 12-months diaries, the 1-month data consistently recorded the weakest correlation coefficients for all cost categories compared to the other time intervals. CONCLUSIONS: Given that diary completion can be particularly challenging for individuals with impaired vision, a minimum 3-months data collection period can provide reliable estimates of annual costs associated with vision impairment.

The economic impact and cost of visual impairment in Australia.

AIMS: To quantify the total economic costs of vision loss in Australia. METHODS: Prevalence data of visual impairment, unpublished data on indirect costs, and national healthcare cost databases were used. RESULTS: Vision disorders cost Australia an estimated A$9.85 billion in 2004. A$4.8 billion is the loss of wellbeing (years of life lost as a result of disability and premature mortality). Vision disorders rank seventh and account for 2.7% of the national loss of wellbeing. Direct health system costs total A$1.8 billion. They have increased by A$1 billion over the last 10 years and will increase a further A$1-2 billion in the next 10 years. Cataract, the largest direct cost, takes 18% of expenditure. The health system costs place vision disorders seventh, ahead of coronary heart disease, diabetes, depression, and stroke. Indirect costs, A$3.2 billion, include carers' costs, low vision aids, lost earnings, and other welfare payments and taxes. CONCLUSIONS: Even a developed economy such as Australia's cannot afford avoidable vision loss. Priority needs to be given to prevent preventable vision loss; to treat treatable eye diseases; and to increase research into vision loss that can be neither prevented nor treated.

Impact of unilateral and bilateral vision loss on quality of life.

AIM: To investigate whether unilateral vision loss reduced any aspects of quality of life in comparison with normal vision and to compare its impact with that of bilateral vision loss. METHODS: This study used cluster stratified random sample of 3271 urban participants recruited between 1992 and 1994 for the Melbourne Visual Impairment Project. All predictors and outcomes were from the 5 year follow up examinations conducted in 1997-9. RESULTS: There were 2530 participants who attended the follow up survey and had measurement of presenting visual acuity. Both unilateral and bilateral vision loss were significantly associated with increased odds of having problems in visual functions including reading the telephone book, newspaper, watching television, and seeing faces. Non-correctable by refraction unilateral vision loss increased the odds of falling when away from home (OR = 2.86, 95% CI 1.16 to 7.08), getting help with chores (OR = 3.09, 95% CI 1.40 to 6.83), and becoming dependent (getting help with meals and chores) (OR = 7.50, 95% CI 1.97 to 28.6). Non-correctable bilateral visual loss was associated with many activities of daily living except falling. CONCLUSIONS: Non-correctable unilateral vision loss was associated with issues of safety and independent living while non-correctable bilateral vision loss was associated with nursing home placement, emotional wellbeing, use of community services, and activities of daily living. Correctable or treatable vision loss should be detected and attended to.

A myopic shift in Australian Aboriginals: 1977-2000.

BACKGROUND/AIMS: The prevalence of myopia has been reported to have increased in a number of population groups. We compared the refraction of Australian Aboriginal adults in 2000 with data collected in 1977 to assess whether there had been a change in the prevalence of myopia. METHOD: Australian Aboriginal adults aged 20 to 30 years old were selected from Central Australian communities in 2000. Refraction was determined by noncycloplegic autorefraction. This was compared to mydriatic retinoscopy data collected in 1977. "Observer trials" were undertaken to assess the comparability of noncycloplegic autorefraction measurements and cycloplegic retinoscopy. Spherical equivalence cylinder and spheric were determined for all right and left eyes and compared using an analysis of variance. RESULTS: A total of 128 adults (58 males, 70 females) were examined in 2000 and compared with 161 adults (107 males, 54 females) examined in 1977. The mean spherical equivalent in 2000 was -0.55 D +/- 0.88 D and in 1977 was +0.54 D +/- 0.81 D. The difference of -1.09 D was highly significant (F = 126, P < .001). Intraclass correlation coefficients showed good agreement between noncycloplegic autorefraction and cycloplegic retinoscopy. Neither gender, schooling, nor diabetes was associated with an increased risk of myopia. CONCLUSIONS: There appears to have been a significant shift toward myopia in Australian Aboriginals between 1977 and 2000. The cause of this myopic shift is unknown but mirrors that observed in other populations in recent years.

Vision impairment and older drivers: who's driving?

AIM: To establish the association between impaired vision and drivers' decisions to stop driving, voluntarily restrict driving, and motor vehicle accidents. METHODS: Driving related questions were included in a population based study that determined the prevalence and incidence of eye disease. Stratified random cluster samples based on census collector districts were selected from the Melbourne Statistical Division. Eligible participants aged 44 years and over were interviewed and underwent a comprehensive ophthalmic examination. The outcomes of interest were the decision to stop driving, limiting driving in specified conditions, and driving accidents. The associations between these outcomes and the legally prescribed visual acuity (<6/12) for a driver's licence were investigated. RESULTS: The mean age of the 2594/3040 (85%) eligible participants was 62.5 (range 44-101). People with visual acuity less than 6/12 were no more likely to have an accident than those with better vision (chi(2) = 0.175, p>0.9). Older drivers with impaired vision, more so than younger adults, restrict their driving in visually demanding situations (p<0.05). Of the current drivers, 2.6% have vision less than that required to obtain a driver's licence. The risk of having an accident increased with distance driven (OR 2.57, CL 1.63, 4.04 for distance >31 000 km) but not with age. CONCLUSION: There was no greater likelihood of self reported driving accidents for drivers with impaired vision than those with good vision. While many older drivers with impaired vision limit their driving in adverse conditions and some drivers with impaired vision stop driving, there are a significant number of current drivers with impaired vision.

Vision impairment in the Pacific region.

The Western Pacific region is one of great diversity, containing the most populous country, China, and many small Pacific island countries. This review describes the prevalence of blindness and vision loss, illustrates the changing trends in the important causes of vision loss and blindness, and the stages of development of the delivery of eye care services across this region.

Changes in management of diabetic retinopathy by Australian ophthalmologists as a result of the NHMRC clinical guidelines.

PURPOSE: To document changes in management of diabetic retinopathy by Australian ophthalmologists after release of the National Health and Medical Research Council (NHMRC) clinical guidelines. METHODS: Self-administered questionnaires were mailed to Australian ophthalmologists prior to release of the NHMRC guidelines for the management of diabetic retinopathy, and at one and 2.5 years after release of the guidelines. The questionnaires elicited information about current management practices in relation to diabetic retinopathy RESULTS: The response rate for the baseline and two follow-up surveys was 82%, 81%, and 80%, respectively. More than 85% of the ophthalmologists responded that the guidelines were useful in improving management, were easy to understand, and were already part of their routine clinical practice. A relatively small percentage (12%) felt that the guidelines made recommendations that were not practical or feasible. Contrary to the NHMRC guidelines, at the second follow-up survey, only 50% of the ophthalmologists said that they would almost never perform fluorescein angiography in eyes with mild non-proliferative diabetic retinopathy. The change from baseline to the second follow-up in the percentage of ophthalmologists who would perform cataract surgery after treating clinically significant macular oedema (as advised by the NHMRC guidelines) was statistically significant (baseline = 83.7%, 95% confidence limit = 80.4, 87.0; second follow up = 90.4, 95% confidence limit = 87.3, 93.5). CONCLUSIONS: Distribution of the printed NHMRC Clinical Practice Guidelines: Management of Diabetic Retinopathy and full colour Retinopathy Chart resulted in a significant change in the recommended order of treatment of clinically significant macular oedema. However no significant change in the use of fluorescein angiography was documented.

Costs of mobile screening for diabetic retinopathy: a practical framework for rural populations.

Australia's rural and remote residents experience considerably higher hospitalisation and death rates due to diabetes than their metropolitan counterparts. There is clearly a need for improved diabetes care services in these areas and interventions that target conditions associated with diabetes will yield beneficial results for the community. All people with diabetes are at risk for diabetic retinopathy, which can cause vision loss and blindness. Although vision loss and blindness due to diabetes is nearly 100% preventable through regular eye examinations, 35% of Victoria's rural population with diabetes do not have their eyes examined on a regular basis. A pilot, mobile screening program for the early detection of diabetic eye disease was conducted in rural Victoria and proved to be a successful model of adjunct eye care for people with diabetes. Actual costs from the pilot screening were applied to a permanent model for rural eye care. At A$41 per participant, costs for mobile screening were competitive with Medicare rebate costs for eye examinations. The model addresses barriers of accessibility and availability, targets a portion of the rural population with diabetes that is not otherwise having eye examinations, and is cost-saving to the Government.

Changes in attitudes and practices of optometrists in their management of diabetic retinopathy after the release of NHMRC guidelines. National Health and Medical Research Council.

The purpose of this study was to document attitudes and practices of Australian optometrists in their management of diabetic retinopathy prior to the release of the National Health and Medical Research Council (NHMRC) Clinical Practice Guidelines for the Management of Diabetic Retinopathy and at two time points following their release. A self-administered questionnaire was mailed to a stratified random sample of 500 Australian optometrists at the three time points. The same sample was used for the first two surveys and a new random sample was drawn for the second follow-up survey. The response to the three questionnaires was 86%, 80% and 84%, respectively. More than 90% of optometrists reported receiving a copy of the guidelines and 82% reported receiving the supplementary Retinopathy Chart. Fifty-seven per cent reported having read the guidelines at least once in entirety and 65% reported that they refer to the Retinopathy Chart at least monthly in their clinical practice. There was a significant decrease in the number of optometrists who reported that patient unwillingness to be dilated and their fear of precipitating angle closure glaucoma were moderate or major barriers to performing dilated ophthalmoscopy. Concomitantly, the percentage of optometrists who reported that they often or always perform dilated ophthalmoscopy on new patients with diabetes increased significantly from 74.5% (95% confidence limit = 70.2, 78.8) to 81.5% (95% confidence limit = 77.5, 85.5). There have been some significant changes in the self-reported management practices of optometrists in relation to diabetic retinopathy since the release of the NHMRC guidelines and Retinopathy Chart.

Assessment of trachoma prevalence in a mobile population in Central Australia.

Trachoma is reported to be hyperendemic in Australia. This study was conducted in a desert area of Central Australia to implement and evaluate the WHO SAFE strategy to control trachoma. The aim of the study was to obtain baseline trachoma prevalence data and to determine whether a single annual visit is adequate for a treatment program targeting households with active cases in a highly mobile population. All registered residents of two Aboriginal communities were eligible for examination. Four visits over the course of 13 months were made to the communities for ocular examinations of residents present at the time of the visit. Examination, diagnosis, and grading of trachoma followed WHO guidelines. The overall examination rate was 75%, refusal rate was <1%, but approximately 50% of community residents were absent during the examination period. Prevalence varied on each visit, but the overall prevalence of active trachoma was 49% over the 13-month period. Children less than 10 years of age had the highest prevalence of active trachoma (79%), over the course of the 13 months, yet the prevalence at any one visit was approximately 60%. Trachomatous scarring was present in 23% of the population. These results suggest that many cases of active trachoma may be missed if a prevalence survey is conducted at only one point in time. Multiple examinations should be conducted to adequately establish prevalence in the population. Antibiotic treatment and health promotion campaigns need to be developed in consideration of local community dynamics.

Diabetic retinopathy: effects of national guidelines on the referral, examination and treatment practices of ophthalmologists and optometrists.

OBJECTIVE: To investigate the changes in referral, examination and treatment practices for diabetic retinopathy by ophthalmologists and optometrists following the release of national guidelines. METHODS: A two-page self-administered questionnaire was mailed to all Australian ophthalmologists and a random sample of 500 Australian optometrists prior to and 1 year after release of the National Health and Medical Research Council of Australia (NHMRC) clinical practice guidelines for the management of diabetic retinopathy. The questionnaires elicited information about current practice related to the management of patients with diabetic retinopathy. RESULTS: Of the 464 contactable ophthalmologists who responded to the baseline survey, 374 (80.6% response) completed the follow-up survey The response rate for the contactable optometrists was 80.1% (310 of 384). There were almost no significant changes in management practices from baseline to follow up. For example, the percentage of ophthalmologists who reported that they were often or almost always confident in detecting moderate retinal thickening near the macula remained nearly identical from baseline to follow up (80.2% vs 79.1 %). The rate was also similar from baseline to follow up for optometrists (31.1% vs 28.8%). The one area in which ophthalmologists reported significant changes in management towards agreement with the NHMRC guidelines was use of angiography; they were less likely to manage their patients this way (20.4% vs 14.2% with laser and 48.9% vs 38.4% without laser for increasing level of severity in clinical signs; both P < 0.05). CONCLUSIONS: The NHMRC guidelines for diabetic retinopathy have been successfully distributed to ophthalmologists and optometrists in Australia. However, the mere provision of the guidelines has had little impact on management practices. It will be important to determine if ongoing dissemination and implementation strategies not only increase awareness of health-care practitioners to the guidelines, but also change behaviours.

Management of diabetic retinopathy by general practitioners in Victoria.

PURPOSE: To compare the self-reported management of diabetic retinopathy by general practitioners to the National Health and Medical Research Council of Australia (NHMRC) Guidelines for the Management of Diabetic Retinopathy. METHODS: In 1994, a stratified (by urban/rural practice location) sample of 500 general practitioners in Victoria was surveyed in regard to their management of diabetic retinopathy. Following the release of the NHMRC Guidelines for the Management of Diabetic Retinopathy in 1997, these same general practitioners were sent a two-page questionnaire related to their management of diabetic retinopathy. RESULTS: Completed questionnaires were received from 228 general practitioners (59% of original participants). Only 37% (79/216) of the general practitioners reported that they had received a copy of the guidelines. Of the general practitioners who had received the guidelines, 18% (14/79) said that they had not read them at all, while 65% (51/79) had read them partially and 18% (14/79) had read them in their entirety. At follow up, less than half (98/214) of general practitioners reported examining 50% or more of their patients for diabetic retinopathy, compared with 104/214 at baseline. General practitioners who had read the guidelines were more likely to report that not being sure what to do when changes were detected was a minor barrier or was not a barrier to them performing dilated ophthalmoscopy (93% vs 83%, chi2(1) = 3.67, P = 0.055). Nearly all of the general practitioners reported that they refer their patients with diabetes to an ophthalmologist or optometrist at least every 2 years as recommended. Seventy-six per cent (170/224) of the general practitioners felt that 70% or more of their patients complied with their instructions to visit an ophthalmologist or optometrist. CONCLUSION: The NHMRC guidelines for diabetic retinopathy appear to have had a positive effect on some of the attitudes of general practitioners who have read them, but more effort is needed to disseminate the guidelines to all general practitioners and to increase their uptake.