At Chu Vision Institute in Minneapolis, we offer corneal cross-linking—a breakthrough procedure that helps stabilize and preserve vision in people experiencing corneal thinning. As one of the first practices in the country to participate in national clinical trials for this treatment, we are proud to bring advanced care and innovative solutions to patients facing vision loss due to corneal instability.

What Is Corneal Cross-Linking?
Corneal cross-linking is an FDA-approved, minimally invasive procedure designed to strengthen the cornea—the clear, dome-shaped front surface of your eye. When the cornea begins to thin or bulge, vision becomes distorted and blurry. Cross-linking works by using ultraviolet (UV) light and riboflavin (vitamin B2) eye drops to increase the collagen bonds in the cornea, helping reinforce its structure and stop further weakening. By stabilizing the cornea, cross-linking may slow or halt progressive vision loss—and in many cases, help preserve your quality of life and delay or prevent the need for a corneal transplant.
Who Can Benefit from Corneal Cross-Linking?
This procedure is most often recommended for patients with:
- Keratoconus, a progressive thinning and bulging of the cornea
- Post-LASIK ectasia, a complication that can occur after laser eye surgery
- Corneal instability in younger patients, especially teens and young adults
While these conditions may sound unfamiliar, their symptoms often include:
- Blurry or distorted vision
- Increasing nearsightedness or astigmatism
- Frequent changes in glasses or contact lens prescriptions
- Eye strain or light sensitivity
If you’ve been told you have keratoconus or suspect your vision changes are worsening quickly, cross-linking could be a crucial intervention.

How the Procedure Works
Performed in-office, corneal cross-linking is a straightforward and safe process:
Preparation
The eye is numbed with drops, and the outer layer of the cornea (epithelium) is gently removed in most cases to allow better absorption.
Riboflavin Application
Vitamin B2 drops are applied to the eye over about 30 minutes to saturate the cornea.
UV Light Exposure
A special UV light is directed at the cornea for another 30 minutes. This activates the riboflavin, triggering the cross-linking of collagen fibers.
Healing Support
A soft bandage contact lens is placed to protect the eye while it heals over the next few days.

What to Expect During Recovery
It’s normal to experience some discomfort, light sensitivity, and blurred vision for several days after the procedure. Most patients return to their normal routine within a week. Vision may fluctuate during the healing process but tends to stabilize over time.
The goal of cross-linking is to stop the progression of corneal weakening—not necessarily to improve vision immediately. However, many patients experience gradual improvements in vision and corneal shape in the months following treatment.
A Leader in Advanced Corneal Care
Chu Vision Institute was proud to be one of the first 40 practices in the U.S. to participate in a multicenter clinical trial for corneal cross-linking. Under the direction of Dr. Ralph Chu, a nationally recognized ophthalmologist and innovator in corneal procedures, our team continues to shape the future of vision care.
Dr. Chu compares the effect of cross-linking to reinforcing a suspension bridge: "Ten cables give more strength than one." By strengthening the internal collagen structure of the cornea, we help protect your vision for the long term—especially in younger patients who are most vulnerable to progression.


Why Choose Chu Vision Institute in Minneapolis?
- Pioneers in corneal cross-linking clinical research
- Advanced diagnostic tools for early detection and treatment planning
- Personalized care plans for every stage of corneal disease
- On-site surgical center with state-of-the-art equipment
- Compassionate, expert team focused on long-term results
Preserve Your Vision. Strengthen Your Cornea.
If you or a loved one is facing progressive corneal thinning, don’t wait. Schedule a consultation at Chu Vision Institute in Minneapolis to learn whether corneal cross-linking is right for you. We're here to protect your sight—today and into the future.
