Vision Improvement with Refractive Correction Does Not Completely Exclude Major Eye Diseases: Analyses of Visually Impaired South Korean Population in the Korea National Health and Nutrition Examination Survey 2009–2011

Table 1

Prevalence of ocular comorbidities in the eyes with visual impairment.

Ocular comorbidities	N	%	SE
Refractive error
Myopia	1831	71.27%	(1.14)
Hyperopia	572	15.27%	(0.78)
Astigmatism	1824	60.31%	(1.17)
Strabismus	108	3.34%	(0.42)
Blepharoptosis	515	14.09%	(0.97)
Cataract	1266	40.71%	(1.50)
Pterygium	224	7.05%	(0.60)
Corneal opacities	52	12.90%	(2.17)
Glaucoma	136	5.49%	(0.58)
Diabetic retinopathy	69	2.92%	(0.46)
Age-related macular degeneration	168	6.85%	(0.60)

The presence of cataract, pterygium, corneal opacities, diabetic retinopathy, and age-related macular degeneration was evaluated only in participants aged ≥ 19 years. The data are based on the eyes with worse presenting visual acuity. N: number; SE: standard error.