About the Cornea and Anterior Segment Disease Service

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​​​​​​​​​​​Toronto Western Hospital | map iconMaps & Directions
East Wing – 6th Floor

​​​​​​​​​​​​​​​​​​​​​​​​​​The Cornea and Anterior Segment Disease Service is part of the Donald K. Johnson Eye Centre and the Krembil Neuroscience Centre.​​

Hours & Contact

Dr. David Rootman & Dr. Clara Chan​
Monday – Friday
8:00 am – 5:00 pm

Phone: 416 603 5401​

Dr. Allan Slomovic
Monday – Friday
8:00 am – 5:00 pm

Phone: 416 603 5389

What We Do

​The cornea is the eye's outermost layer. It is the clear, dome-shaped surface made up of a group of cells and proteins. But it has no blood vessels to nourish or protect it against infection. Instead, it gets the vital fluids it needs from tears and what's called the aqueous humor, that ​fills the chamber behind it.

For the past two decades, the Cornea and Anterior Segment  Disease Service at UHN has been offering state of the art diagnostic and therapeutic services to local, national and international patients.  The treatments we perform include corneal transplantations, artificial corneas, and anterior segment reconstruction for corneal ulcers, burns, and perforations. We also help manage corneal and conjunctival tumours, pterygium, limbal stem cell disease, aniridia, Stevens Johnson Syndrome, and ocular cicatricial pemphigoi​d.

We also have a cornea stem cell transplant program that is unique to Canada and uses the ​latest technology and implants to treat cornea conditions.

 Health Information

Visit our health information section.​


  • OCT Test (Optical Coherence Tomography)
  • Cornea Pentacam Test​​
  • Endothelial Cell Counts
  • Keratometry
  • Corneal topography​


Learn more about how we are providing leading care in Ontario for cornea stem cell transplantation: Lim​bal Stem Cell Transplant Video