Developed by Dorothy Beam




Дата канвертавання19.04.2016
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Developed by

Dorothy Beam



Sclerocornea

What is it?


The Sclera is the visible, white portion of the eye, and the cornea is the clear/ transparent covering over the iris and the pupil. Sclerocornea is when the cornea becomes white/ opague and vascularized. The whiteness occurs when collagen fibers in the corneal stroma are larger than normal and become concentrated and dense. In full sclerocornea, the cornea and the sclera can become difficult to tell apart.

See the photo below.


How did this happen?


Sclerocornea is a congenital condition that occurred before birth. Sometimes sclerocornea is a genetic defect that is inherited, but many times it just happens.

Frequently, sclerocornea is accompanied by other ocular abnormalities or non-ocular birth defects. Sclerocornea is a non-progressive condition that will not migrate or move to other areas of the cornea or eye. This condition remains stable over time.

How does it affect the Eye?


More often than not, this condition affects both eyes (bilaterally), but it can occur in just one of the eyes (unilaterally). When the cornea becomes white/ opaque, the person may lose some, or all of their vision depending on where the condition is located. The entire cornea is not always affected. If it is on the edges of the cornea, where the cornea meets the sclera, it will affect the peripheral vision. When this happens it is difficult to see clearly when looking outside of one’s center vision (eg. looking out of the corners of the eyes). If it covers the main, center portion of the cornea, visual acuity will be low and it will be very difficult to see clearly. In severe cases the person will be blind and unable to see at all.


Can it be treated?
Penetrating keratoplasty can be performed but the outcome is very uncertain. It is more effective treating the peripheral vision than treating main vision. It also depends on how deep and severe the concentration of the collagen fibers is.

It is best for this treatment to be performed early in life.



Sources:

  1. eMedicine from WebMD http://emedicine.medscape.com/article/1197148-overview

  2. http://wwweyepathologist.com/disease.asp?IDNUM=310930

  3. http://www.missionforvisionusa.org/anatomy/2006/12/what-is-sclerocornea.html

  4. http://www.mondofacto.com/facts/dictionary?query=sclerocornea&action=look+it+up

  5. Dictionary of Eye Terminology 5th Ed., Barbara Cassin and Melvin L. Rubin, MD, Editor

  6. www.biomedcentral.com/.../9/figure/F1?highres=y




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