Demographic and clinical characteristics, according to pterygium status in the Korean National Health and Nutrition Examination Survey 2008–2011.

<p>Demographic and clinical characteristics, according to pterygium status in the Korean National Health and Nutrition Examination Survey 2008–2011.</p

The odds ratios of pterygium according to quintiles of blood vitamin D levels (reference group = lowest vitamin D quintile group).

<p>The odds ratios of pterygium according to quintiles of blood vitamin D levels (reference group = lowest vitamin D quintile group).</p

The comparison of odds ratios of ocular diseases including dry eye syndrome (DES), cataract, age-related macular degeneration (AMD), any diabetic retinopathy (DR), and vision-threatening DR (VTDR) according to the blood vitamin D levels (reference group = lowest vitamin D quintile group).

<p>The comparison of odds ratios of ocular diseases including dry eye syndrome (DES), cataract, age-related macular degeneration (AMD), any diabetic retinopathy (DR), and vision-threatening DR (VTDR) according to the blood vitamin D levels (reference group = lowest vitamin D quintile group).</p

Flow diagram showing the selection of study participants.

<p>Flow diagram showing the selection of study participants.</p

Demographic and clinical characteristics by quintile blood 25-Hydroxyvitamin D categories among representative Korean adults aged 19 years or older.

<p>Demographic and clinical characteristics by quintile blood 25-Hydroxyvitamin D categories among representative Korean adults aged 19 years or older.</p

Demographic and clinical characteristics, according to dry eye syndrome (DES) status, as reported in the Korean National Health and Nutrition Examination Survey 2010–2012.

<p>Demographic and clinical characteristics, according to dry eye syndrome (DES) status, as reported in the Korean National Health and Nutrition Examination Survey 2010–2012.</p

Relative association between serum 25-hydroxyvitamin D and ocular diseases including diabetic retinopathy (DR), vision threatening diabetic retinopathy (VTDR), age-related macular degeneration (AMD), cataract and dry eye syndrome (DES) among representative Korean adults.

<p>Relative association between serum 25-hydroxyvitamin D and ocular diseases including diabetic retinopathy (DR), vision threatening diabetic retinopathy (VTDR), age-related macular degeneration (AMD), cataract and dry eye syndrome (DES) among representative Korean adults.</p

The odds ratios of dry eye syndrome according to quintiles of blood vitamin D levels (reference group = <12.3 ng/ml)

<p>The odds ratios of dry eye syndrome according to quintiles of blood vitamin D levels (reference group = <12.3 ng/ml)</p

Prevalence of dry eye syndrome (DES) in subjects with or without vitamin D deficiency (25-hydroxyvitamin D < 20 ng/mL).

<p>Prevalence of dry eye syndrome (DES) in subjects with or without vitamin D deficiency (25-hydroxyvitamin D < 20 ng/mL).</p

Gender difference of blood 25-Hydroxyvitamin D levels (ng/mL) of men and women according to age group and other variables among representative Korean adults aged 19 years or older.

<p>Blood 25-hydroxyvitamin D levels were expressed as weighted estimates [%] (standard errors [%], 95% confidence intervals).</p