Comparison of the effects of different chromatic lights on accommodative response and microfluctuation in myopes and emmetropes / 中华实验眼科杂志

Objective:To explore the effects of conflicting stimuli generated by different chromatic lights on visual display terminal (VDT) on accommodative response and microfluctuation of myopes and emmetropes, and to investigate the possible relationship between chromatic light, accommodation and the development and progression of myopia.Methods:A non-randomized controlled trial was conducted.Forty-one subjects aged 22 to 30 years old were enrolled, including 19 emmetropes in emmetropic group and 22 myopes in myopic group.The subjects had the normal color vision and no ocular organic diseases.The interventions were screens of different colors.There were 7 chromatic light conditions, including 3 monochromatic lights (red, green, blue), 3 bichromatic lights (red+ green, red+ blue, green+ blue) and 1 polychromatic light (white=red+ green+ blue). Subjects were asked to look at a black E target on a VDT at a distance of 33 cm for more than 20 seconds.The background color of the VDT was changed randomly in the 7 chromatic light conditions.The accommodative responses were recorded with the Grand Seiko WAM-5500 automatic infrared refractor every 0.2 seconds and the accommodative microfluctuation was calculated as the standard deviation of the accommodative response.Accommodative response and accommodative microfluctuation under different chromatic light conditions were compared.This study adhered to the Declaration of Helsinki.The study protocol was approved by the Ethics Committee of the First Affiliated Hospital, Zhejiang University School of Medicine (No.2019-1564). Written informed consent was obtained from each subject.Results:No statistically significant difference was found in the accommodative response between the two groups ( Fgroup=2.626, P=0.113). There was a statistically significant difference under different chromatic light conditions between the two groups ( Flight=39.070, P<0.01). There were similar trends in the effects of various color lights in both groups, with the largest accommodative response under monochromatic red light, followed by the bichromatic light containing red light, and then the smallest accommodative response under monochromatic blue light, and the differences were statistically significant (all at P<0.05). The accommodative microfluctuations under red, green, blue, red+ blue, red+ green, blue+ green and white light conditions were (0.142±0.033), (0.128±0.038), (0.131±0.043), (0.139±0.039), (0.127±0.034), (0.131±0.043) and (0.139±0.042)D in emmetropic group, and (0.178±0.043), (0.164±0.043), (0.159±0.039), (0.174±0.042), (0.166±0.036), (0.159±0.031) and (0.174±0.035)D in myopic group, respectively, showing statistically significant differences between them ( Fgroup=12.146, P<0.01; Flight=2.782, P<0.05). The accommodative microfluctuations under the 7 light conditions were higher in myopic group than in emmetropic group, and the differences were statistically significant (all at P<0.05). In myopes, the accommodative microfluctuation was the largest under red light, which was significantly larger than that under blue light, and was the smallest under blue+ green light (all at P<0.05). There was no significant difference in the accommodative microfluctuation between bichromatic light and its two monochromatic lights, or between the polychromatic light (white light) and its three monochromatic lights (all at P>0.05). There was no significant effect of various chromatic lights on the accommodative microfluctuation in emmetropic group (all at P>0.05). Conclusions:The accommodative microfluctuation is greater in myopes than in emmetropes.The stimuli produced by long-wavelength light cause larger accommodative microfluctuation, while conflicting stimuli generated by different chromatic lights do not increase accommodative microfluctuation.

Partial Body Weight Support on Walking Ability for Stroke Following Hemiplegia at Early Stage / 中国康复理论与实践

@#ObjectiveTo observe the effect of early partial body weight support on walking ability for stroke patients with hemiplegia.Methods60 stroke patients were divided into 3 groups, receiving conventional early rehabilitation: group A (20 cases) received conventional rehabilitation for 8 weeks; group B (20 cases) received 2 weeks conventional rehabilitaion and 6 weeks partial body weight support; group C (20 cases) received 5 weeks conventional rehabilitaion and 3 weeks partial body weight support. Fugl-Meyer Assessment(FMA), Barther Index(BI) and Berg Balance Scale(BBS) were used to assess the effect before and after treatment.ResultsThe socres of FMA, BI and BBS improved in walking function after the treatment(P<0.05). Comparing with groups A and C, group B improved more significantly after treatment (P<0.05), and group C was better than group A (P<0.05). ConclusionPartial body weight support can improve walking function of hemiplegic patients at early stage.

Retinal detachment due to ocular contusion / 中华眼底病杂志

Objective To find out about the characteristics and prognosis of retinal detachment due to ocular contusion. Methods The clinical data of 36 patients (36 eyes) with retinal detachment due to ocular contusion were retrospectively analyzed. Results There were 3 eyes (8.3%) with huge retinal hole (≥90?), 4 eyes (11.1%) oral tear of ora serrata retinae, 4 eyes (11.1%) with macular hole, 3 eyes (8.3%) with tractive retinal detachment, and 22 eyes (61.2%) with retinal hole (

Reliability and characteristics of ultrasonography in patients with severe proliferative diabetic retinopathy / 中华超声影像学杂志

Objective To evaluate the percentage of agreement between the ultrasonographic data and the surgical findings,and investigate the characteristics of the ultrasonographic imaging of proliferative diabetic retinopathy.Methods B-scan ultrasonography was performed in 48 patients (62 eyes ) affected by proliferative diabetic retinopathy,before vitreoretinal surgery,by observing and recording the position,shape,range,to evaluate the percentage of agreement between the ultrasonographic data and surgical findings.Results Ultrasonography can show kinds of vitreoretinal changes clearly,and is not affected by the opacity of refractive media.The agreement was quite good for the pathological changes of proliferative diabetic retinopathy.The accurate rates of diagnosis of vitreous hemorrhage,posterior vitreous detachment,retinal detachment,vitreal membranes,vitreoretinal adhesions and preretinal membranes were 100%, 91.9%, 94.9%, 96.4%, 80.0% and 87.9%,respectively.Conclusions B-scan ultrasonography is valuable in proliferative diabetic retinopathy and favorable in the ophthalmic clinic practice.