Why is a bandage contact lens used after PRK surgery?

PRK removes the corneal epithelium, leaving a raw surface that is painful and vulnerable. A bandage contact lens covers this surface, dramatically reducing pain by preventing lid friction during blinking, and creates a protected environment for epithelial cells to regenerate. It is typically worn for 3-5 days until re-epithelialization is complete.

Do bandage contact lenses correct vision?

No. Bandage contact lenses are typically plano (no refractive power). Their purpose is therapeutic: protecting the cornea, reducing pain, and promoting healing. They are not designed for vision correction.

Why must antibiotics be used with bandage contact lenses?

A BCL placed over a damaged corneal surface creates a warm, moist, enclosed environment that can promote bacterial growth. The compromised epithelium lacks its normal barrier defense against infection. Topical antibiotic prophylaxis prevents organisms from colonizing the vulnerable surface beneath the lens.

Bandage Contact Lenses: Corneal Protection, Healing Promotion, and Therapeutic Applications

What Is a Bandage Contact Lens?

A bandage contact lens (BCL) is a therapeutic soft contact lens applied to the eye to protect the cornea and promote healing. Unlike standard contact lenses, BCLs are not prescribed for vision correction. They typically have plano power (no refractive correction) and serve as a physical barrier between the damaged corneal surface and the external environment, particularly the blinking eyelid.

How Bandage Lenses Work

The BCL provides several therapeutic functions simultaneously:

Pain reduction: The lid passes over the smooth lens surface rather than dragging across the damaged epithelium with each blink, dramatically reducing pain
Mechanical protection: Shields the cornea from lid friction, foreign bodies, and environmental exposure
Healing environment: Creates a stable, protected space where epithelial cells can migrate and regenerate without disruption
Moisture retention: Helps maintain tear film contact with the corneal surface

Common Indications

Corneal Abrasions

Large or painful corneal abrasions benefit from BCL application. The lens reduces pain immediately and allows the epithelium to heal under protection.

Recurrent Corneal Erosion (RCE)

Patients with RCE experience repeated spontaneous epithelial breakdown, often upon waking. A BCL worn continuously for several weeks allows the epithelium to re-establish firm adhesion to the underlying basement membrane.

Post-Surgical Protection

After PRK: The most common use. A BCL is placed at the end of surgery and worn until the epithelium regenerates (typically 3-5 days)
After corneal crosslinking: Protects the de-epithelialized cornea
After pterygium removal: Shields the healing tissue

Other Conditions

Filamentary keratitis: Prevents filament attachment to the corneal surface
Bullous keratopathy: Covers ruptured epithelial bullae to reduce pain
Chemical burns: Protects healing epithelium after acute chemical injury

A bandage contact lens addresses pain and promotes healing but does not treat the underlying condition. It is always used in conjunction with appropriate medical therapy (antibiotics, anti-inflammatories, lubricants) targeted at the specific diagnosis.

Lens Selection

BCLs should be selected for biocompatibility and oxygen permeability:

High Dk/t material: Since BCLs are often worn continuously (including overnight), high oxygen transmissibility is essential to prevent hypoxic complications on an already compromised cornea
Silicone hydrogel preferred: Modern BCLs are typically silicone hydrogel for superior oxygen delivery
Plano power: No refractive correction needed
Appropriate diameter: Should cover the entire cornea with stable centration

Critical Safety Considerations

Antibiotic prophylaxis: Always prescribe topical antibiotics when a BCL is in place over a damaged cornea. The compromised epithelium is vulnerable to infection, and the lens can trap organisms against the surface
Close follow-up: Monitor every 1-3 days to assess healing and watch for signs of infection
Patient education: Instruct the patient not to remove the BCL unless instructed. Premature removal disrupts healing
Remove promptly when healed: Leaving a BCL in place after the epithelium has healed exposes the patient to unnecessary infection risk from extended wear

Applying a bandage contact lens without concurrent antibiotic coverage. A BCL placed over a damaged corneal surface without antibiotic prophylaxis creates an ideal environment for bacterial growth: a warm, moist, enclosed space with compromised epithelial defense.

When applying a BCL post-PRK, ensure it is centered and not trapped under the lid. An off-center BCL leaves part of the healing area exposed and can cause irregular epithelial regeneration. Check centration before the patient leaves the surgical suite.

Key Takeaways

Bandage contact lenses protect the cornea and reduce pain but do not correct vision
Primary indications include corneal abrasions, recurrent erosions, and post-surgical healing (especially PRK)
High-Dk silicone hydrogel materials are preferred due to continuous wear requirements
Antibiotic prophylaxis is mandatory when a BCL covers a compromised corneal surface
Close follow-up every 1-3 days is essential to monitor healing and detect early infection
Remove the BCL promptly once healing is complete