eye disorders
Blurred Vision
Etiology of Blurred Vision
Themost commoncauses of blurred vision (see table) include Overview of Refractive Error (the most common cause overall) Age-Related Macular Degeneration (AMD or ARMD) None Cataract None Diabetic Retinopathy None Blurred vision has 4 general mechanisms: Opacification of normally transparent ocular structures (cornea, lens, vitreous), through which light rays must pass to reach the retina Disorders affecting the retina Disorders affecting the optic nerve or its connections Refractive errors Certain disorders can have more than one mechanism. For example, refraction can be impaired by early cataracts or the reversible lens swelling caused by poorly controlled Diabetes Mellitus (DM) . Patients with certain disorders that cause blurred vision (eg, acute corneal lesions [such as abrasions], Corneal Ulcer , Rare disorders that can cause blurred vision include hereditary optic neuropathies (eg, dominant optic atrophy, Leber hereditary optic neuropathy) and corneal scarring due to Vitamin A Deficiency . 