Before surgery

After surgery

This is a small growth on the cornea (the clear part of the eye).  It is due to damaged stem cells by ultraviolet light (sun) and dryness.  Dr. Chiu removes the pterygium and transplant stem cells to prevent it from regrow.  The stem cells are harvested from your own eye which decreases risk of rejection.  Dr. Chiu has a high success rate with the technique she uses.

Cornea Transplant

The cornea is the clear cover of the eye.  It can be damaged in numerous ways such as hereditary diseases, infections, degenerations and trauma.  If the other parts of the eye are healthy, removing the cornea can help restore visual function.  There are many types of cornea transplant, broadly divided into full thickness or partial thickness transplant.  Dr. Chiu will examine your eye and discuss with you the best options to treat the diseased cornea.

Fuchs Endothelial Dystrophy (Before DSAEK)

Fuchs Endothelial Dystrophy (After DSAEK)


In some eyes, Dr.Chiu can perform DMEK where the partial thickness cornea transplant is as thin as cling wrap, giving better vision and less chance of rejection.

Cornea Scar (Before PKP)

Cornea Scar (After PKP)

Cross Linking

The cornea (clear front part of the eye) can sometimes bulge, so called ectatic cornea.  This causes distorted and blurry vision.  It can be hereditary or weakened by excessive rubbing or Lasik.  Examples of hereditary conditions are keratoconus, pellucid marginal degeneration and keratoglobus.  Cross linking is a procedure that helps to stiffen the cornea so that it does not continue to bulge.  It involves scrapping off the superficial layer of the cornea, apply riboflavin (vitamin B2) eye drops and expose the cornea to UV-A light.  A contact lens is used to cover the cornea until the surface has healed. This is the only procedure that prevents the condition from progressing.