Intraestromal Corneal Ring in Mild Keratoconus

University of Sao Paulo65 enrolled

Overview

To determine whether the implantation of an intrastromal corneal ring is an effective treatment for a homogeneous group of mild keratoconus patients.

A group of 65 patients with mild keratoconus were implanted with a Ferrara ring in a single eye. Six months after surgery, the aberrations were measured and the visual function was determined using clinical indices. The aberrations, especially comatic aberration (coma), were measured independently.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Cornea Eye Diseases Keratoconus Ophthalmological Disorder

Interventions

Intraestromal corneal ringDEVICE

The patients underwent surgery to implant the intrastromal corneal ring (Ferrara Ophthalmics, Belo Horizonte, Brazil) using a manual technique. The procedures were performed by a single surgeon with extensive training in corneal surgery. All patients received the same ring, and the number (1 or 2 segments), thickness, and arc size were calculated using the nomogram provided by the manufacturer.

Eligibility

Sex: ALLMin age: 17 YearsMax age: 47 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Investigators used the Amsler-Krumeich classification and included only patients classified as grade I or II. Exclusion Criteria: * Investigators excluded patients with central corneal scarring, with other eye disorders, or with previous ocular surgery. We also excluded patients with a history of herpes infection, keratitis, corneal dystrophies, diagnoses of autoimmune diseases, systemic connective tissue disorders, or acute keratoconus.

Locations (1)

Hospital das Clínicas

São Paulo, São Paulo, Brazil

Outcomes

Primary Outcomes

Aberrations were measured and the visual function was determined using clinical indices.

Wave front data

Time frame: 3 months after surgery

Secondary Outcomes

UCVA

Uncorrected visual acuity

Time frame: 3 months after surgery

BCVA

Best corrected visual acuity

Time frame: 3 months after surgery

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.