The Tan EndoGlide device results in less endothelial cell trauma during insertion of the donor corneal graft indicated by reduced endothelial cell loss at 1 year follow-up compared to the Busin glide.

Inclusion Criteria:

• Patients presenting with corneal decompensation requiring DSAEK with or without cataract surgery for visual rehabilitation.
• Clinical diagnosis include endothelial cell dysfunction secondary to Fuchs endothelial dystrophy, pseudophakic or aphakic bullous keratopathy, failed penetrating keratoplasty or DSAEK, iridocorneal endothelial syndrome or trauma.
• Ability to understand the nature of the procedure and give full informed consent.
• Patients who are able to comply with the standard DSAEK follow-up protocol at the Toronto Western Hospital.

Exclusion Criteria:

• Patients with late stage corneal decompensation with stromal scarring unsuitable for DSAEK and therefore requiring penetrating keratoplasty.
• Patients with complex anterior segment pathology precluding successful DSAEK procedure.
• Patients not giving full informed consent to participate in the trial