OBJECTIVES: To explore the mediating role of sleep duration in the relationship between depression symptoms and myopia among middle school students. METHODS: This study was a cross-sectional research conducted using a stratified cluster random sampling method. A total of 1 728 middle school students were selected from two junior high schools and two senior high schools in certain urban areas and farms of the Xinjiang Production and Construction Corps. Questionnaire surveys and vision tests were conducted among the students. Spearman analysis was used to analyze the correlation between depression symptoms, sleep duration, and myopia. The Bootstrap method was employed to investigate the mediating effect of sleep duration between depression symptoms and myopia. RESULTS: The prevalence of myopia in the overall population was 74.02% (1 279/1 728), with an average sleep duration of (7.6±1.0) hours. The rate of insufficient sleep was 83.62% (1 445/1 728), and the proportion of students exhibiting depression symptoms was 25.29% (437/1 728). Correlation analysis showed significant negative correlations between visual acuity in both eyes and sleep duration with depressive emotions as measured by the Center for Epidemiologic Studies Depression Scale (with correlation coefficients of -0.064, -0.084, and -0.199 respectively; P<0.01), as well as with somatic symptoms and activities (with correlation coefficients of -0.104, -0.124, and -0.233 respectively; P<0.01) and interpersonal relationships (with correlation coefficients of -0.052, -0.059, and -0.071 respectively; P<0.05). The correlation coefficients for left and right eye visual acuity and sleep duration were 0.206 and 0.211 respectively (P<0.001). Sleep duration exhibited a mediating effect between depression symptoms and myopia (indirect effect=0.056, 95%CI: 0.029-0.088), with the mediating effect value for females (indirect effect=0.066, 95%CI: 0.024-0.119) being higher than that for males (indirect effect=0.042, 95%CI: 0.011-0.081). CONCLUSIONS Sleep duration serves as a partial mediator between depression symptoms and myopia in middle school students.
Humans ; Myopia/etiology* ; Male ; Female ; Depression/physiopathology* ; Cross-Sectional Studies ; Sleep ; Adolescent ; Students ; Child ; Time Factors ; Sleep Duration

BACKGROUNDIt was well known that tangential vitreoretinal traction and epiretinal membrane play important roles during the formation of macular hole (MH) associated with retinal detachment (RD) in highly myopic eyes. But it was not clear about the correlations between anteroposterior traction, posterior vitreous cortex (PVC) and MH-RD. The vitreous status in highly myopic eyes were analyzed to explore the effect of PVC in the role of MH-RD formation.

METHODSSixteen consecutive highly myopic eyes with RD due to MH were retrospectively analyzed from January 2009 to April 2009. The preoperative examinations for detecting posterior vitreous detachment (PVD) and vitreoretinal traction included B-mode ultrasonography and optical coherence tomography (OCT). The residual PVC and PVD were confirmed intraoperatively during triamcinolone acetonide (TA) assisted vitrectomy.

RESULTSUnder ultrasonography, the preoperative PVD patterns were stratified as: complete PVD in three (19%) eyes, partial PVD in eight (50%) eyes, and no PVD in five (31%) eyes. OCT confirmed vitreoretinal traction and no complete PVD in 10 (63%) eyes, including anteroposterior traction in four eyes and tangential traction in six eyes. During TA-assisted vitrectomy, it was confirmed that no complete PVD existed in 16 eyes, including six eyes (38%) finally diagnosed of partial PVD, and five (31%) eyes with vitreoschisis. Anteroposterior vitreoretinal traction around MH is always in conjunction with partial PVD (67%), and high proportion (80%) of vitreoschisis is associated with tangential vitreoretinal traction. Comparing with the precision of TA staining of PVD diagnosis, the coincidence rate of ultrasonography was 69% (P = 0.02), and that of OCT was 63% (P < 0.01).

CONCLUSIONSThe residual PVC due to partial PVD or vitreoschisis may cause the anteroposterior or tangential traction of macular area, which contributes to the formation of MH and subsequent RD in highly myopic eyes. And it is necessary to realize the vitreoretinal relationship and assess the status of PVC synthetically for surgery by combined ultrasonography and OCT preoperatively and TA staining intraoperatively.

Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Middle Aged ; Myopia ; physiopathology ; Retinal Detachment ; physiopathology ; Retinal Perforations ; etiology ; Retrospective Studies ; Vitreous Detachment ; physiopathology

We report a case of one sister and brother with mirror image myopic anisometropia. One sister and brother complained visual disturbance. The sister was 10 years 11 months old, and brother was 8 years 4 months old. Full ophthalmic examinations were performed, including slit lamp examination, intraocular pressure, keratometry, anterior chamber depth, axial length, fundus examination and the cycloplegic refraction. The cycloplegic refractive power was -15.50 dpt cyl.+4.50 dpt Ax 85degrees (right eye), -1.00 dpt cyl.+0.50 dpt Ax 90degrees (left eye) in the sister; -1.75 dpt cyl.+2.25 dpt Ax 90degrees (right eye), -9.50 dpt cyl.+4.00 dpt Ax 80degrees (left eye) in the brother. The co-occurrence of severe myopic anisometropia in a sister and brother is extremely rare. The present case suggests that severe myopic anisometropia may be related by genetic inheritance.
Anisometropia/*etiology/*genetics/physiopathology/therapy ; Child ; Female ; Humans ; Male ; Myopia/*complications/*genetics/physiopathology/therapy ; Refraction, Ocular ; *Siblings ; Visual Acuity

INTRODUCTIONThis paper reports the 1-year results of the first 2 cases of macular translocation in Singapore.

CLINICAL PICTUREA 66-year-old female and a 45-year-old male Chinese presented with subfoveal choroidal neovascularisation (CNV) in their right eyes. The woman's condition was secondary to pathological myopia while the man's was idiopathic. Their preoperative best-corrected visual acuities were 6/15-2 and 6/30, respectively.

TREATMENTBoth patients underwent macular translocation with punctate retinotomies and chorioscleral infolding (limited macular translocation) in their affected eye.

OUTCOMEBoth patients achieved effective macular translocation postoperatively. Their CNVs became extrafoveal and were ablated with conventional laser photocoagulation in the early postoperative period. They did not recur and their visual acuities improved to 6/9-1 and 6/12 at 1 year postoperatively, respectively.

CONCLUSIONMacular translocation is a new treatment modality that offers patients with subfoveal CNV a chance of improving their vision, potentially to a level that may allow reading and driving.

Aged ; Choroidal Neovascularization ; diagnostic imaging ; etiology ; surgery ; Female ; Fluorescein Angiography ; Humans ; Laser Coagulation ; Macula Lutea ; transplantation ; Macular Degeneration ; diagnostic imaging ; physiopathology ; Male ; Middle Aged ; Myopia, Degenerative ; complications ; Prognosis ; Radiography ; Severity of Illness Index ; Singapore ; Treatment Outcome ; Visual Acuity

To investigate the chronological change of refraction in premature infants after cryotherapy for retinopathy of prematurity (ROP), cycloplegic refractions had been performed at 6 months and 3 years after term in premature infants who underwent cryotherapy for ROP. The changes of refractions between the two study ages were evaluated not only in the total cryo-treated eyes, but also in the subdivided groups according to the posterior pole appearances. In the total 61 eyes of 32 premature infants, mean spherical equivalents were -4.05D vs. -5.94D (6 months vs. 3 years) (p = 0.0001). In the normal posterior pole group (48 eyes), mean spherical equivalents were -3.45D vs. -5.68D (6 months vs. 3 years) (p = 0.0000), and in the abnormal posterior pole group (13 eyes), -6.28D vs. -6.86D (6 months vs. 3 years) (p = 0.6496). These results mean that there is a myopic progressive change between 6 months and 3 years after term in the cryo-treated eyes for acute ROP and it is more evident in the eyes with normal posterior pole.
Acute Disease ; Child, Preschool ; Cryosurgery/*adverse effects ; Follow-Up Studies ; Gestational Age ; Humans ; Infant ; Infant, Newborn ; *Infant, Premature ; Myopia/*etiology/physiopathology ; *Refraction, Ocular ; Retinopathy of Prematurity/physiopathology/*surgery

We quantitatively analyzed the changes of the (retinal) threshold sensitivities between normal status and dilated emmetropic status, and between dilated emmetropic status and -1.0D induced myopic status. Three consecutive visual field examinations by Humphrey Field Analyzer C-30-2 threshold test and STATPAC program were performed in 36 eyes of 21 normal subjects who ranged in age from 23 to 40 years. The results were as follows: 1) There was a statistically significant decrease (0.87 +/- 0.91dB)in the mean threshold sensitivity within the central 30 degrees at the dilated emmetropic status (27.90dB) as compared with the normal status (28.77dB)(p = 0.0001). 2) There was a statistically significant decrease(0.99 +/- 0.61dB) at -1.0D induced myopic status(26.91dB) as compared with the dilated emmetropic status(27.90dB)(p = 0.0001). 3) After dilation, the mean threshold sensitivity between 20 and 30 degrees of field showed statistically significant decrease as compared with those within the central 20 degrees of visual field(p < 0.05). In case of -1.0D induced myopia, there were uniform decreases in the mean threshold sensitivities within the central 30 degrees of visual field (p > 0.05). Therefore, we emphasize the importance of consistent pupillary size and correct refractive state in performing the serial automated visual field tests.
Adult ; Female ; Humans ; Male ; Myopia/etiology/*physiopathology ; Pupil/drug effects ; Pupil Disorders/chemically induced/*physiopathology ; Retina/physiology ; Sensory Thresholds/*physiology ; Tropicamide/pharmacology ; Visual Field Tests ; Visual Fields/*physiology