Keratoconus



Keratoconus is a condition that results from an irregularly shaped cornea (the front transparent
structure of the eye), which prevents light from focusing correctly on the retina. In keratoconus, the
normally round cornea becomes thin and more cone-shaped, causing blurred vision and sensitivity
to bright lights. Keratoconus is a progressive disease, that means that this poor vision gets poorer
with time and our goal is to stop this deterioration and improve vision.

What Causes Keratoconus?

There is no known cause for keratoconus, although experts have theorized many causes, including
preexisting medical conditions, heredity, allergies, and eye rubbing. It is a gradual, slow moving
disease, which typically starts in the late teens to early twenties and may continue for several
years.

Symptoms of Keratoconus

In the early stages, keratoconus causes slightly blurred vision and increased sensitivity to bright
lights. As it progresses (over 10 to 20 years), vision may become more and more distorted.
Symptoms include:

Distorted vision at all distances
“Ghost” images – the appearance of several images when looking at one object
Poor night vision
Light sensitivity
Eye strain
Noticeably worse vision in one eye
Double vision in one eye
Treatment of Keratoconus

As we noted earlier, Keratoconus is a progressive disease with poor vision that gets poorer, so in
our treatment we have 2 goals:

1) Stop the deterioration: and this is achieved by Corneal Collagen Crosslinking (C3R)
2) Improving vision: and this is done by Glasses in the early stages, or a special refractive
procedure to decrease the irregularities of the cornea, or Rigid Permeable Contact lenses or
unfortunately, our only option could be changing the cornea with a penetrating keratoplasty.
What is Corneal Collagen Crosslinking (C3R)

In this treatment that was , we use green eyedrop Riboflavin (Vitamin B2) on the eye for 20
minutes, that is followed by the exposure to a controlled beam of UltraViolet light for 10 minutes.
This will induce a reaction in the cornea to increase the interconnections between the fibres.



The procedure itself is not painful, and patients tolerate it well. After treatment, a contact lens is
applied for 4 days to protect the cornea, after which the doctor removes it in the clinic. The patient
is expected to have hazy vision for few weeks that gets totally relieved after.

The goal of the procedure is to stabilize vision, but recent studies came out saying that the
procedure might help in improving vision as well in up to 50% of patients.