Impairment of visual acuity and reading performance and the relationship with cataract type and density
| Autor: | Herbert Weghaupt, Thomas Benesch, Stefan Sacu, Eva Stifter |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Male
medicine.medical_specialty Visual acuity genetic structures medicine.medical_treatment Eye disease Visual impairment Vision Disorders Visual Acuity Cataract Extraction Cataract Vision disorder Cataracts Ophthalmology medicine Humans Prospective Studies Partial correlation Aged business.industry Cataract surgery medicine.disease eye diseases Reading Female medicine.symptom Posterior subcapsular cataract business Visually Impaired Persons |
| Zdroj: | Investigative ophthalmologyvisual science. 46(6) |
| ISSN: | 0146-0404 |
| Popis: | To evaluate the association between the density of nuclear, cortical, and posterior subcapsular lens opacities and visual impairment in patients with cataract.In 80 patients, visual acuity and reading performance were evaluated 1 day before and 4 weeks after cataract surgery. Cataracts were categorized and graded according to the Lens Opacities Classification System (LOCS) III of nuclear color (NC), nuclear opalescence (NO), cortical (C), and posterior subcapsular cataract (P). A multiple linear regression analysis and partial correlation coefficients were calculated. Data were also checked for significant pre- and postoperative differences in visual performance related to cataract grading.In the multiple linear regression analysis, significant associations were found between the improvement in visual acuity and reading performance after cataract surgery and the NC, NO, and P scores (P0.001); no significant association was found for the C score (P0.05). High partial correlation coefficients were found between the P score and the preoperative visual acuity (r = 0.6; P0.001), reading acuity (r = 0.74; P0.001), and maximum reading speed (MRS; r = -0.77; P0.001). Significant but lower partial correlation coefficients were found for the NO score. No significant partial correlation coefficients were found for the NC and C score. Significant pre- and postoperative differences in MRS were found in patients with P scoresor =3 or NO and NC scoresor =5, representing functionally relevant impairment.A strong association was found between visual impairment in patients with cataract and the severity of posterior subcapsular cataract (PSC) and nuclear opacity. Particularly in patients with PSC, deficits in reading performance significantly increased. The functionally relevant deficits in patients with P scoresor =3 or NO and NC scoresor =5, should be carefully considered for planning cataract surgery or visual rehabilitation. |
| Databáze: | OpenAIRE |
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