CTAK questions, answered

CTAK (corneal tissue addition for keratoconus) adds a custom-shaped piece of sterilized donor corneal tissue into a small channel made by a femtosecond laser. The added tissue is designed to reshape the cone toward a more regular curve. You may also see it written as C-TAC on our site.

People with keratoconus whose vision is limited by the irregular shape of the cornea, and who are poorly served by glasses or contacts. Whether CTAK fits you depends on your corneal maps, thickness and history.

No. Cross-linking aims to strengthen the cornea and slow progression. CTAK aims to improve the corneal shape. Cross-linking is offered as Epioxa (epi-on), insurance approval only. Epi-off is not a standard option; it may be considered only as a conditional exception if Glaukos approves it in select cases.

No. CTAK adds tissue to your own cornea rather than replacing a full-thickness section of it. Your surgeon explains how that compares with transplant options for your stage of keratoconus.

Keratoconus care starts with the $395 VIP lifestyle exam (self-pay) or an annual eye exam through insurance, because the decision depends on detailed corneal imaging. Bring your medical insurance card if you are using insurance.

Pricing is provided at your exam, once we know your plan and whether medical insurance applies.

Most people need some days of rest and frequent follow-up while the eye settles, and vision continues to change for weeks. You get a written schedule for drops, screens and activities.

Often, yes, but many patients find glasses or contacts easier to use once the cornea is more regular. Your surgeon discusses realistic goals for your eyes.