Intrastromal Ring Segments: Stabilise and Reshape Vision in Keratoconus
A minimally invasive solution designed to regularise the cornea and improve visual quality in patients with keratoconus.
What are Intrastromal Ring Segments?
Intrastromal ring segments (ICRS) are small, arc-shaped implants made from biocompatible material that are inserted into the corneal stroma to reshape and support the cornea. These implants help flatten the steep areas of the cornea in keratoconus, regularising its curvature and reducing visual distortions.
Benefits of Intrastromal Ring Segments:
- Improved Vision: Enhances clarity and reduces ghosting or double vision by reshaping the cornea.
- Corneal Support: Adds structural stability to the weakened cornea.
- Minimally Invasive: Requires no tissue removal and is reversible.
- Lens Compatibility: Improves contact lens fit and comfort.
- Delay or Avoid Transplant: Can significantly postpone the need for a corneal transplant in many cases.
Advanced imaging and corneal mapping
Planning ring size and position based on topography
Minimally invasive insertion using femtosecond laser guidance
Postoperative monitoring and optimisation
Are You Searching for a Non-Transplant Solution for Keratoconus?
You may benefit from intrastromal ring segments if:
- You have mild to moderate keratoconus
- Your vision is distorted despite using glasses or contact lenses
- You want to delay or avoid corneal transplant
- You experience frequent prescription changes
- You are looking for a reversible and non-destructive treatment option
Download The Keratoconus Information Pack
Years helping people see better
Patients treated
Years of experience for our lead surgeon
Who is a Candidate for Intrastromal Rings?
| Criteria | ICRS |
|---|---|
| Diagnosed with keratoconus | ✅ |
| Mild to moderate corneal distortion | ✅ |
| Suitable corneal thickness for implantation | ✅ |
| Contact lens intolerance | ✅ |
| No advanced corneal scarring | ✅ |
International Patients
We welcome international patients who are seeking advanced, tailored keratoconus care. Our team can help coordinate a visit that includes consultation, imaging, treatment, and recovery all in one streamlined trip to London.
How Much Do Intrastromal Rings Cost?
Pricing depends on the ring type, surgical planning, and individual eye condition. A detailed treatment plan and cost breakdown are provided after consultation.
Comprehensive
Eligibility
Assessment
From
£2,500
Per Eye
Flexible
Installments
0% Interest
Your Patient Journey
At Harley Street Eye Centre in London, your care is consultant-led and tailored to your vision, lifestyle and goals. From first enquiry through consultation, diagnosis and treatment, we explain every step in plain language and agree a plan together. Our clinic at 22a Harley Street combines advanced diagnostics and modern laser/surgical technology with clear aftercare and long-term monitoring where needed (e.g., keratoconus, glaucoma, retina). Use the tabs to see what happens at each stage — from booking to recovery — and what to expect on the day. When you’re ready, book a consultation or call our team.
We’re here to listen first. Tell us what’s bothering you, how it affects your day, and what you’d like to achieve. Our team will guide you to the most suitable consultant and appointment type at Harley Street Eye Centre.
- Share your symptoms, history and goals
- Quick suitability check for key treatments
- Advice on records to bring (glasses Rx, letters, scans)
- Appointment scheduled at a convenient time
- Clear confirmation with directions and next steps
We’re excited to see you at your appointment. Ask us anything — about treatments, the clinic, timings or fees. Our goal is to help you regain your independence and live life free from visual limitations.
- Discuss your eye health goals and lifestyle needs
- Full eye examination by a consultant ophthalmologist
- Vision testing and treatment eligibility assessment
- Diagnostic scans if required (e.g., OCT, topography, biometry)
- Start a personalised treatment plan and timeline
After reviewing your results, your consultant explains the findings in plain language and outlines safe, evidence-based options. You’ll make an informed decision together.
- Clear explanation of your diagnosis and prognosis
- Side-by-side comparison of suitable treatments (incl. non-surgical)
- Benefits, risks and expected recovery times discussed
- Transparent pricing and payment options explainedWritten summary of the agreed plan
You’ll be welcomed by our clinical team, who will conduct final checks and ensure your comfort throughout. Most procedures are quick with minimal downtime.
- Arrival, consent review and last-minute questions answered
- Pre-op measurements confirmed; anaesthetic drops if needed
- Consultant-delivered procedure using modern technology
- Immediate post-op checks and tailored aftercare instructions
- Safe journey-home guidance and contact details for support
Good outcomes rely on good aftercare. We’ll review your progress, fine-tune any medications as needed, and be available to provide advice if you require it between visits.
- Scheduled follow-ups to monitor healing and vision
- Symptom checklist and when to get in touch
- Medication/use of drops reviewed and adjusted
- Activity guidance (work, driving, exercise, screen time)
- Direct access to our team for reassurance and queries