No, you should not wear contact lenses while treating a stye with erythromycin ointment.
Remove your contact lenses immediately and keep them out until the stye has completely resolved and you have finished the antibiotic treatment.
Why Contact Lenses Must Be Removed
When you have any active eye infection or inflammation—including a stye (hordeolum)—contact lens wear creates several serious risks:
- Increased infection risk: Contact lenses can trap bacteria against your eye and create an environment that promotes bacterial growth, potentially worsening the infection or causing it to spread to your cornea 1
- Medication interference: Ophthalmic ointments like erythromycin are greasy and will coat contact lenses, making them unwearable and potentially trapping medication and bacteria between the lens and your eye
- Risk of corneal complications: The combination of infection, contact lens wear, and topical medication significantly increases your risk of developing bacterial keratitis—a vision-threatening corneal infection 1
The Evidence on Contact Lenses and Eye Infections
The 2024 Bacterial Keratitis Preferred Practice Pattern guidelines are explicit: "Remove the contact lenses and consult your doctor immediately if you experience symptoms such as redness, pain, tearing, increased light sensitivity, blurry vision, discharge, or swelling" 1. A stye causes exactly these symptoms—redness, pain, and swelling of the eyelid.
Contact lens wear is already the largest risk factor for bacterial keratitis in the United States 1, and wearing lenses during an active infection compounds this risk substantially. Even overnight wear of contact lenses increases the risk of corneal infections fivefold compared to daily wear 1.
Practical Treatment Approach
During treatment:
- Stop wearing contact lenses completely
- Apply erythromycin ointment as prescribed (typically to the eyelid margin, not inside the eye for a stye) 2
- Wear your glasses instead
- Follow proper eyelid hygiene as directed by your doctor 3
After treatment:
- Wait until the stye has completely resolved
- Complete your full course of erythromycin treatment
- Get clearance from your eye doctor before resuming contact lens wear
- Have your contact lens fit reassessed to ensure proper hygiene practices 1
Common Pitfall to Avoid
Do not attempt to "just wear them for a few hours" or wear them between medication applications. The ointment residue will remain on your eye and lids, and the infection risk persists as long as the stye is present. Ointment formulations are specifically incompatible with contact lens wear due to their greasy base that will adhere to lens surfaces 2.
When you do resume contact lens wear after complete resolution, consider switching to daily disposable lenses if you're not already using them, as they have the lowest rate of complications 4.