Cherry eye is a condition in dogs and cats where the tear gland of the third eyelid prolapses, leading to a reddened mass in the inner corner of the eye. The third eyelid, or nictitating membrane, houses an important tear gland that contributes to tear film production, necessary for eye lubrication.
Causes
Cherry eye occurs when the tissue fibers holding the tear gland in place are weaker than normal, causing the gland to protrude. Some dog breeds, especially smaller ones like Boston terriers, cocker spaniels, bulldogs, and beagles, may be more prone to this condition due to genetic factors.
Treatment: Replacing the Gland
The best treatment for cherry eye is to replace the prolapsed tear gland to its proper location. Two common surgical techniques are used for this purpose:
- Tucking Method: A single stitch is permanently placed to draw the gland back into place. While complications are uncommon, the stitch may come undone or may not hold well enough, requiring further surgical attempts.
- Imbrication Method: A wedge of tissue is removed from over the gland, and the incision is closed using dissolvable stitches. The tightening of the incision margins helps push the gland back into place. Complications may include inflammation, inadequate tightening of the tissue gap, or suture failure.
Both techniques may be used together to ensure successful gland replacement. Recurrence of cherry eye can happen, and if it occurs, further surgery may be required.
Treatment: Removing the Gland
Historically, cherry eye was treated by removing the prolapsed gland like a tumor. However, this approach is no longer recommended as the tear gland is vital for tear production. Removing the tear gland can lead to dry eye, discomfort, thick yellow discharge, and blinding pigment covering the eye. Daily medical treatment is needed to maintain comfort and vision in such cases. It is essential to preserve tear-producing tissue to avoid dry eye and its associated complications.
Cherry eye in dogs and cats should be promptly addressed by a veterinarian. The surgical replacement of the tear gland is the preferred treatment option, while removal of the gland is avoided due to potential complications.
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