Mettapracharak Hospital (Wat Rai Khing), under the Department of Medical Services, has warned that corneal ulcers—a condition caused by inflammation or injury to the cornea—can result from several factors, including prolonged contact lens use, improper lens care, sleeping with lenses on, or excessive eye rubbing. People with dry eyes or allergies are also at higher risk. Additionally, small foreign particles like dust, sand, or metal can trigger inflammation and infection.

Wearing contact lenses has become increasingly popular for both cosmetic and vision correction purposes. However, improper use—especially wearing lenses for extended periods without breaks or failing to maintain proper hygiene—can lead to serious eye conditions such as corneal ulcers. These require prompt recognition and proper care. Warning signs include eye pain, burning, blurry vision, light sensitivity, tearing, or redness. If any of these symptoms appear, it is important to see an ophthalmologist immediately to avoid potential vision loss.

The cornea, the transparent front layer of the eye, plays a crucial role in focusing light onto the retina. Any injury to this area, no matter how small, can immediately affect vision. One of the most common causes of corneal ulcers is infection, especially from bacteria associated with unclean contact lenses. This is often seen in individuals who already have minor corneal injuries. Other causes include physical trauma, such as dust or foreign objects entering the eye, which can lead to further inflammation and infection.

Long-term or overnight use of contact lenses significantly increases the risk of corneal ulcers due to reduced oxygen and moisture supply to the cornea. This can cause surface cells to deteriorate and result in corneal abrasions, creating entry points for bacteria and amoebas found in unclean water. These infections can progress rapidly and may result in permanent blindness if left untreated.

Treatment depends on the cause and severity. Mild cases from irritation or minor scratches may be treated with antibiotic eye drops and artificial tears, along with temporary discontinuation of lens use. For deeper or infected ulcers, specific medications and frequent dosing may be necessary. In cases where the cornea is severely damaged and vision is permanently affected, corneal transplantation may be required.

Corneal ulcers are a serious eye health issue that should not be ignored. The key to prevention lies in safe contact lens practices—cleaning, soaking, and removing lenses properly, never wearing them overnight, and limiting use to no more than 8 hours a day. Any abnormal symptoms such as discomfort, burning, blurred vision, or pain warrant an immediate visit to an eye specialist. Maintaining good eye hygiene, avoiding direct eye contact with dirty hands, and getting regular eye check-ups are the best defenses against permanent vision loss.

Source:

Thaihealth