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Posted on May 16, 2014 |

Common Causes Of Vision Loss

Common Causes Of Vision Loss

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Vision loss is the absence of vision where it existed before, which can happen either acutely (i.e., abruptly) or chronically (i.e., over a long period of time).

Causes of vision loss

  • Media opacity – Corneal oedema, hyphema, cataract, vitreous haemorrhage
  • Retinal disease – Retinal vascular occlusions, macular degeneration, retinal detachment, retinitis pigmentosa
  • Optic nerve disease – Optic neuritis, papilledema, papillitis, glaucoma, ischemic optic neuropathy
  • Visual pathway disorder – Brain tumours, cortical blindness
  • Traumatic causes – Accidents, sport injury, chemical burns
  • Functional disorders – Hysterical malingering

Conditions that may cause visual impairment

Systemic conditions:

  • Diabetes mellitus
  • Hypertension
  • Cerebrovascular disease
  • Atherosclerotic disease
  • HIV due to infection with cytomegalovirus
  • Vitamin A deficiency
  • Infections involving the eyes

Specific eye conditions:

  • Macular degeneration
  • Cataract
  • Glaucoma
  • Eye injuries
  • Tumour involving the eye as
    surrounding structures in the head and

Common causes of blindness

Blindness is the condition of lacking visual perception due to physiological or neurological factors. Total blindness is the complete lack of form and visual light perception. Legal blindness is defined as visual acuity of 20/200 or 6/60 or less in

According to the World Health Organization estimates, the most common causes of blindness around the world are:

  • Cataract
  • Glaucoma
  • Age-related macular degeneration
  • Corneal opacity
  • Diabetic retinopathy
  • Childhood blindness