Monday, February 8, 2010

ari ini kita akan belajar lagi satu health issue iaitu keratoconus.

What is keratoconus?
Keratoconus is a progressive eye disease in which the normally round cornea thins and begins to bulge into a cone-like shape. This cone shape deflects light as it enters the eye on its way to the light-sensitive retina, causing distorted vision. - All About Vision
Keratoconus (KC) is a progressive, noninflammatory, bilateral (but usually asymmetrical) disease of the cornea, characterized by paraxial stromal thinning that leads to corneal surface distortion. Visual loss occurs primarily from irregular astigmatism and myopia and secondarily from corneal scarring - eMedicine from WebMD
Keratoconus (from Greek: kerato- horn, cornea; and konos cone), is a degenerative disorder of the eye in which structural changes within the cornea cause it to thin and change to a more conical shape than its normal gradual curve - Wikipedia
 Signs & Symptoms:
1. Minor blurring of vision at the early stage
2. Impaired visual acuity
3. Poor night vision
4. Photophobia
5. Eye itchiness
6. Monocular polyopia

What caused keratoconus?
New research suggests the weakening of the corneal tissue that leads to keratoconus may be due to an imbalance of enzymes within the cornea. This imbalance makes the cornea more susceptible to oxidative damage from compounds called free radicals, causing it to weaken and bulge forward.

 Keratoconus treatment:
1. Eyeglasses or soft contact lenses (early stage)
2. Rigid gas permeable
3. "Piggybacking" contact lenses
4. Corneal inserts aka kera-ring (delay the needs to corneal transplant)
5. Corneal cross linking
6. Corneal transplant (last resort)

In Malaysia, the best consultation can be obtained from Tun Hussein Onn National Eye Specialist Hospital (THONEH).

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