Intrastromal Corneal Ring Segment Implantation in 219 Keratoconic Eyes at Different Stages

Intrastromal Corneal Ring Segment Implantation in 219 Keratoconic Eyes at Different Stages

The purpose of this study is to properly analyse the visual and refractive outcomes of implantation of KeraRing intrastromal corneal ring segment (ICRS) at the different stages of keratoconus.

Inclusion Criteria:

• Patients who had keratoconus
• Contact lens intolerance and clear cornea.
• The maximum keratometric reading was less than 60.00 diopters (D)
• The minimum corneal thickness more than 300 μm.

Exclusion Criteria:

• Acute or grade IV keratoconus.
• Previous corneal or intraocular surgery.
• Cataract, history of glaucoma or retinal detachment, macular degeneration or retinopathy, neuro-ophthalmic diseases, and history of ocular inflammation