What are the symptoms and treatment methods for filamentary keratitis?

Filamentary keratitis generally refers to filamentary corneal lesions, which may cause symptoms such as conjunctival congestion, red eyes, foreign body sensation in the eye, photophobia, and eye pain. Treatment methods include dietary adjustments, lifestyle modifications, topical medications, oral medications, and intravenous drug administration. A detailed analysis is as follows:

I. Symptoms

1. Conjunctiva or Cornea
When filaments form on the cornea, local inflammation and irritation may occur. If this spreads to adjacent conjunctival tissues, it may lead to congestion of the conjunctiva or cornea.

2. Red Eye
Filaments forming on the corneal surface may rub against the cornea or conjunctiva, causing dilation of ocular blood vessels. This increased blood flow into ocular tissues results in redness of the eye.

3. Foreign Body Sensation
This condition may interfere with the normal lubricating function of tears on the corneal surface. When the cornea lacks sufficient lubrication, it becomes more susceptible to external stimuli, leading to a sensation of having a foreign body in the eye.

4. Photophobia
When nerve endings on the corneal surface are stimulated or damaged, it may result in dryness and pain in the eye, increasing sensitivity to light and thus causing photophobia.

5. Eye Pain
Filamentary corneal lesions may lead to corneal epithelial defects or ulcer formation. When these lesions expose sensitive nerve endings and deeper corneal tissues, they can trigger eye pain.

II. Treatment

1. Dietary Adjustment
During illness, it's advisable to consume light foods such as vegetables and apples, while avoiding spicy or irritating foods, which may help shorten recovery time.

2. Lifestyle Adjustment
It's important to develop good eye-use habits and maintain proper eye hygiene. Avoid rubbing the eyes with dirty hands, as this helps improve symptoms.

3. Topical Medications
As directed by a physician, use topical medications such as levofloxacin eye drops, lomefloxacin hydrochloride eye drops, or erythromycin eye ointment to control inflammation and prevent further progression of the disease.

4. Oral Medications
If topical treatment proves ineffective, oral antibiotics such as amoxicillin capsules, cefixime tablets, or cefuroxime axetil tablets may be prescribed to control inflammation and relieve ocular discomfort.

5. Surgical Intervention
If the above treatments are ineffective, patients should visit a hospital where a specialist can remove the filaments under slit-lamp microscopy after topical anesthesia, using a cotton swab moistened with normal saline to alleviate symptoms.

Good eye-use habits should be maintained during the course of the illness. If symptoms persist for an extended period, prompt medical evaluation and active treatment are necessary.