Corneal Ulcers in Leopard Geckos

A corneal ulcer is an open sore or defect in the cornea, the clear outer layer at the front of the eye. In leopard geckos, this is a true eye emergency because the cornea is delicate, exposed, and essential for vision. Ulcers can be shallow and limited to the surface, or they can become deep, infected, or even perforate if treatment is delayed.

These ulcers are painful. Affected geckos may keep the eye closed, stop hunting well, or become less active because seeing prey and navigating the enclosure becomes harder. In reptiles, eye disease is also closely tied to husbandry, shedding, and nutrition, so the ulcer itself may be only part of the problem.

The good news is that many corneal ulcers heal with timely care. Your vet will focus on two goals at the same time: protecting the eye while it heals and identifying why the ulcer happened in the first place. That may mean looking closely at substrate, humidity support for shedding, supplements, feeder insect gut-loading, and any recent trauma or retained shed.

Most corneal ulcers start with irritation or trauma. That can include rubbing the eye on rough décor, scratches from feeder insects, retained shed stuck around the eye, or foreign material such as dust, loose substrate, or dried debris. Even a small surface injury can turn into an ulcer if the cornea stays irritated.

Husbandry often plays a role. Leopard geckos need an appropriate temperature gradient and enough humidity support to shed normally, including access to a humid hide. Enclosures that are too dry, rough DIY hides with sharp edges, unstable climbing items, or abrasive substrate can all increase risk. Poor sanitation can also allow secondary infection to complicate a minor injury.

Nutrition matters too. Leopard geckos are prone to eye problems when diet and supplementation are not well balanced. Hypovitaminosis A is a recognized reptile problem and can contribute to abnormal eye surface health, retained shed, discharge, and swelling around the eyes. That does not mean every swollen eye is a vitamin A problem, but it is one reason your vet may ask detailed questions about feeder variety, gut-loading, and supplement schedules.

Your vet will start with a careful history and physical exam, then perform a focused eye exam. In many cases, the key test is fluorescein stain, a dye that sticks to damaged corneal tissue and helps confirm an ulcer. This is a standard, practical way to tell whether the cornea has lost its protective surface.

Your vet may also look for retained shed, foreign material, eyelid swelling, discharge, dehydration, and signs of poor husbandry or nutritional imbalance. Bringing photos of the enclosure, lighting, supplements, substrate, and humid hide can be very helpful. For leopard geckos, those details often change the treatment plan.

If the ulcer appears deep, infected, melting, or slow to heal, your vet may recommend additional testing such as cytology, culture, or referral to an exotics veterinarian with ophthalmology experience. Some geckos need gentle restraint or sedation for a complete exam. Rechecks are important because the first visit confirms the problem, but follow-up visits show whether the cornea is actually healing.

Prevention starts with enclosure setup. Use safe, non-abrasive surfaces, remove sharp décor, and make sure hides and climbing items cannot tip or scrape the face. Keep the enclosure clean so debris and bacteria are less likely to irritate the eye. If you use loose substrate, feed in a dish and watch closely for eye irritation or debris exposure.

Support normal shedding. Leopard geckos do best with a proper temperature gradient and access to a humid hide, even though they are an arid species overall. Retained shed around the eyes can trap debris and damage the cornea, so any repeated shedding trouble deserves a husbandry review with your vet.

Nutrition is another big piece. Offer appropriately varied feeder insects, gut-load them well, and use supplements exactly as your vet recommends. Avoid guessing with vitamin A products, because both deficiency and oversupplementation can cause problems. Annual wellness visits with an exotics veterinarian can catch early eye, skin, and nutrition issues before they turn into a painful ulcer.