Cornea

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Cornea

The cornea is the clear tissue at the front and center of the eye. Its transparency permits light to pass in to the eye.it helps protect the eye from infection and foreign material.

What are the different types of corneal disease

  • Infection

    • Bacterial
    • Fungal or Viral keratitis
  • Trauma

    • Abrasions or exposure to toxic chemicals
  • Nutritional deficiency

    • Vit. A deficiency
  • Allergies

    • Vernal and atopic keratoconjunctivitis
  • Growth

    • Ptergiyum or benign or malignant cancerous growth on the eye’s surface
  • Ectasia(thinning)

    • Keratoconus or thinning of cornea following refractive laser surgery
    • The cornea can also be damaged secondarily by other common eye conditions such as; dry eye , eye lid disorders , glaucoma

Keratoconus

Keratoconus is a disorder of the eye which results in progressive thinning of cornea

Causes

Exact causes are unknown. It is believed to occur due to genetic, environmental and hormonal factors

Symptoms

  • Blurring of vision

  • Light sensitivity

  • Near sightedness

Treatment

  • Glass

  • Contact lens (RGP lens)

  • Surgery (C3R-corneal collagen cross linking)

Diagnosis

  • Visual acuity

  • Retinoscopy

  • Opthalmoscopy

  • Corneal topography

Dry eye

Dry eye occurs the eye does not produce tears properly, or when the tears are not of the correct consistency and evaporate too quickly

Symptoms

  • Burning of the eye

  • Foreign body sensation

  • Pain and redness of the eye

  • Blurring of vision

Causes

  • Ageing

  • Changes in the hormone

  • Exposure to sun, wind or dry climate

  • Contact lens over time use

  • Eye injury

  • Rheumatoid arthritis

Treatment

Treatment depends on sensitivity. Lubricating eye drops can be given

Pterygium

Pterygium is a growth of the conjunctiva that occurs the white part opf your eye over conjunctiva

Causes

Exact causes are unknown. Certain elements causes higher risk of developing this condition are UV radiation, pollen,sand,smoke and wind

Symptoms

  • Redness

  • Blurring of vision

  • Foreign body sensation

  • Itching

Treatment

  • Medication

  • Surgery