Blindness ; epidemiology ; etiology ; prevention & control ; China ; epidemiology ; Humans ; Vision, Low ; epidemiology ; etiology ; prevention & control

INTRODUCTIONThe purpose of this review is to combine the results of existing literature on the natural history of occult choroidal neovascularisation (CNV) associated with age-related macular degeneration (AMD).

MATERIALS AND METHODSPublished reports evaluating eyes with occult CNV in AMD patients were selected for meta-analysis based on a computerised MEDLINE search. Pooled estimates of the proportions of eyes with a vision loss greater than 2 to 3 (moderate vision loss) or 6 lines (severe vision loss) at 1 year and 2 to 3 years, respectively, or developing a classic component on fluorescein angiography at 1 year were measured.

RESULTSThere is no significant heterogeneity among published rates of visual loss and development of classic CNV. The overall pooled estimates (95% confidence limits) of the proportions of eyes with at least moderate or severe vision loss, respectively, were 59% (53% to 64.5%) and 34% (25% to 43%) at 1 year and 70% (64% to 76%) and 47% (40% to 54%) at 2 to 3 years; the overall pooled estimate of the percentage of eyes developing classic CNV at 1 year was 46% (39% to 54%).

CONCLUSIONA substantial number of patients with occult CNV from AMD will develop at least moderate visual loss at 1 year and severe visual loss within 3 years. However, visual acuity may remain stable in up to 30% of patients. These results may help us to understand the exact role of new therapies and in planning future trials.

Choroidal Neovascularization ; complications ; physiopathology ; Humans ; Macular Degeneration ; complications ; physiopathology ; Vision, Low ; etiology

Adolescent ; Ethmoid Sinus ; Humans ; Male ; Osteoma ; complications ; Skull Neoplasms ; complications ; Vision, Low ; etiology

Diplopia ; etiology ; Enophthalmos ; etiology ; Exophthalmos ; etiology ; Facial Nerve Injuries ; etiology ; Hemorrhage ; etiology ; Humans ; Intraoperative Complications ; etiology ; prevention & control ; Orbit ; blood supply ; surgery ; Orbital Fractures ; surgery ; Postoperative Complications ; etiology ; prevention & control ; Reconstructive Surgical Procedures ; adverse effects ; Reflex, Trigeminocardiac ; Vision, Low ; etiology

OBJECTIVETo determine the prevalence, cause and distributions of blindness and poor vision in patients with leprosy.

METHODSAn epidemiological survey of blindness and poor vision among 1045 cases of leprosy was carried out in Taixing City of Jiangsu Province, China.

RESULTSThe prevalence of bilateral blindness was 7.67%, unilateral blindness 4.4%, bilateral poor vision of various degrees 9.28% and unilateral poor vision 5.84%. The prevalence of eye complications varied significantly among different groups of patients; females had a higher prevalence than males, multibacillary patients higher than paucibacillary patients, and in-patients higher than out-patients. Corneal disease was the most common cause of blindness in study groups, followed by iritic disease and cataract; while the main cause of poor vision was cataract, then corneal and iritic diseases. Treatable blindness accounted for 62.7% of the cases and treatable poor vision for 88.6% of the patients studied. 56.62% of cases with eye complications expressed their willingness to be treated.

CONCLUSIONSAlthough prevention and treatment of low vision and blindness in leprosy patients is very hard, it is necessary for doctors and medical workers to make clear of the factors to cause low vision and blindness, especially those in leprosy patients so that some measures for prevention and treatment of the disease could be taken accordingly.

Adult ; Aged ; Aged, 80 and over ; Blindness ; epidemiology ; etiology ; China ; epidemiology ; Female ; Humans ; Leprosy ; complications ; Male ; Middle Aged ; Prevalence ; Vision, Low ; epidemiology ; etiology

OBJECTIVE: To review the clinical manifestations and management of nasal sinus mucoceles with visual loss. METHOD: Medical records for 23 patients of paranasal sinus mucoceles with visual impairment were re viewed retrospectively during 8-year period (from 2002 to 2010). Ten mucoceles were found in the frontal or fronto-ethmoidal sinuses, 6 in the ethmoidal sinuses, 7 in the sphenoidal or spheno-ethmoidal sinuses. Because the majority of early chief complaints were problems related to vision, patients were often seen by ophthalmologists first. Poor vision was more common in patients with sphenoid or spheno-ethmoidal sinus mucoceles because of their proximity to the optic nerve. CT and MRI were important tools for diagnosing nasal sinus mucocele. The patients received endoscopic surgery to remove mucocele and to decompress the optic nerve. Steroid therapy was given postoperatively and routine examination with endoscopy were carried out during follow-up. RESULT: Postoperatively, the majority of symptoms, such as exophthalmos, epiphora, diplopia and headache, disappeared in all patients. However, vision recovery was observed only in some patients. Recovery of vision depended on the timing of surgery and severity of initial visual loss. Delay in treatment can seriously compromise recovery of vision impairment. Moreover, patients without light perception before surgery had poor visual recovery even if optic nerve decompressions were performed. CONCLUSION Endoscopic surgery is effective to nasal sinus mucocele with visual loss. Because visual recovery depends on prompt diagnosis and surgical intervention, a good understanding of the disease and prompt imaging studies are important.
Adolescent ; Adult ; Cysts ; complications ; diagnosis ; surgery ; Female ; Humans ; Male ; Middle Aged ; Paranasal Sinus Diseases ; complications ; diagnosis ; surgery ; Retrospective Studies ; Vision, Low ; etiology ; Young Adult

The purpose of our study was to evaluate the characteristics and the changes of low vision patients over ten years in Korea, and to establish useful data for planning low vision services, active care and rehabilitation. We conducted a retrospective study of 681 low vision patients who visited two low vision clinics in Seoul from 1995 to 2008. Age and sex distribution, cause of low vision, type of prescribed low vision aids, and changes of the characteristics were reviewed. In result, male were more than female. The age group between 11 and 20-yr-old (18.1%) was the largest age group. Optic atrophy (28.3%) was main causes of low vision. However, elderly low vision patients is increasing and macular degeneration is becoming a leading cause of low vision (P<0.05). One thousand five low vision aids (LVAs) were prescribed for 681 patients (1.46+/-0.62 aids for each patient). Near LVAs were prescribed more than distance LVAs. In most patients, the use of LVAs improved both near and distance visual function. This study is the first survey of a large number of low vision patients over a ten year period in Korea. On the base of this study, the planning of low vision services and more active rehabilitation for low vision patients, especially elderly patients, need in Korea.
Adolescent ; Adult ; Age Distribution ; Age Factors ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; Female ; Humans ; Macular Degeneration/complications ; Male ; Middle Aged ; Optic Atrophy/complications ; Republic of Korea ; Retrospective Studies ; Sex Factors ; Vision, Low/*etiology

INTRODUCTIONRefractive error remains one of the primary causes of visual impairment in children worldwide, and the prevalence of refractive error varies widely. The objective of this study was to determine the prevalence of refractive error and study the possible associated factors inducing refractive error among primary school children of Malay ethnicity in the suburban area of Kota Bharu, Kelantan, Malaysia.

MATERIALS AND METHODSA school-based cross-sectional study was performed from January to July 2006 by random selection on Standard 1 to Standard 6 students of 10 primary schools in the Kota Bharu district. Visual acuity assessment was measured using logMAR ETDRS chart. Positive predictive value of uncorrected visual acuity equal or worse than 20/40, was used as a cut-off point for further evaluation by automated refraction and retinoscopic refraction.

RESULTSA total of 840 students were enumerated but only 705 were examined. The prevalence of uncorrected visual impairment was seen in 54 (7.7%) children. The main cause of the uncorrected visual impairment was refractive error which contributed to 90.7% of the total, and with 7.0% prevalence for the studied population. Myopia is the most common type of refractive error among children aged 6 to 12 years with prevalence of 5.4%, followed by hyperopia at 1.0% and astigmatism at 0.6%. A significant positive correlation was noted between myopia development with increasing age (P <0.005), more hours spent on reading books (P <0.005) and background history of siblings with glasses (P <0.005) and whose parents are of higher educational level (P <0.005). Malays in suburban Kelantan (5.4%) have the lowest prevalence of myopia compared with Malays in the metropolitan cities of Kuala Lumpur (9.2%) and Singapore (22.1%).

CONCLUSIONThe ethnicity-specific prevalence rate of myopia was the lowest among Malays in Kota Bharu, followed by Kuala Lumpur, and is the highest among Singaporean Malays. Better socio-economic factors could have contributed to higher myopia rates in the cities, since the genetic background of these ethnic Malays are similar.

Child ; Cross-Sectional Studies ; Female ; Follow-Up Studies ; Humans ; Malaysia ; epidemiology ; Male ; Prevalence ; Refraction, Ocular ; Refractive Errors ; complications ; epidemiology ; physiopathology ; Retrospective Studies ; Schools ; Suburban Population ; statistics & numerical data ; Vision, Low ; epidemiology ; etiology ; physiopathology ; Visual Acuity

OBJECTIVETo determine the prevalence of ocular trauma and the proportion of blindness and visual impairment due to trauma in a rural population in northern China.

METHODSThe Handan Eye Study is a population-based cross-sectional study that surveyed 6830 Chinese people aged 30+ years from 13 randomly selected villages in Yongnian County, city of Handan, Hebei Province, in July, 2006. All participants underwent a standardized interview and extensive examinations. A structured questionnaire was used to collect information on ocular trauma.

RESULTSOf the 5837 participants who filled out the questionnaire, 124 subjects [2.1%; 95% confidence interval (CI), 1.8%-2.5%] reported a history of ocular trauma in either eye, including 19 (0.3%) persons reporting trauma in both eyes. Men were more likely to have an eye injury than women [odds ratio (OR), 3.3; 2.2-4.9]. In multiple logistic regression models, ocular trauma was significantly more frequent among normotensive participants when compared with hypertensive participants (hypertensive vs. normotensive: OR, 0.6; 0.4-0.9) and among participants who had a history of falls (OR, 2.4; 1.2-4.8). The proportion of unilateral visual impairment and unilateral blindness due to trauma were 10.5% (13 subjects) and 21.0% (26 subjects), respectively.

CONCLUSIONOur study reports the prevalence of severe ocular trauma among adults in rural China, revealing a high proportion of blindness and visual impairment due to trauma. These findings suggest the need for educational strategies to increase eye health awareness in this rural population with focus on providing at least appropriate first aid care to reduce blindness due to trauma.

Adult ; Age Factors ; Aged ; Aged, 80 and over ; Blindness ; epidemiology ; etiology ; China ; epidemiology ; Cross-Sectional Studies ; Eye Injuries ; complications ; epidemiology ; Female ; Humans ; Male ; Middle Aged ; Odds Ratio ; Prevalence ; Random Allocation ; Risk Factors ; Rural Population ; statistics & numerical data ; Sex Factors ; Surveys and Questionnaires ; Vision, Low ; epidemiology ; etiology ; Visually Impaired Persons ; statistics & numerical data

INTRODUCTIONInvasive fungal pan-sinusitis can present atypically with severe acute visual loss with minimal anterior orbital inflammation. We describe 2 such cases with a background of uncontrolled diabetes.

CLINICAL PICTURERespective clinical presentations of orbital apex and cavernous sinus syndromes were associated with isolation of Aspergillus galactomannan and Rhizopus.

TREATMENTUrgent extensive surgical debridement and systemic antifungal is necessary.

OUTCOMEClinical improvement of the ocular motor nerves can be expected within 2 months of treatment but visual loss is usually permanent.

CONCLUSIONUnderlying pansinusitis is an important differential for acute visual loss, especially in uncontrolled diabetics. Early treatment determines outcome.

Adult ; Antifungal Agents ; therapeutic use ; Antigens, Fungal ; analysis ; Aspergillosis ; complications ; diagnosis ; therapy ; Aspergillus ; immunology ; isolation & purification ; Debridement ; methods ; Diabetes Complications ; blood ; complications ; therapy ; Diagnosis, Differential ; Female ; Follow-Up Studies ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Mucormycosis ; complications ; diagnosis ; therapy ; Rhizopus ; immunology ; isolation & purification ; Sinusitis ; complications ; diagnosis ; therapy ; Tomography, X-Ray Computed ; Vision, Low ; diagnosis ; etiology ; therapy