Postoperative vision assessment after changing one of the steps of laser surgery degree correctio

Not Applicable

• Conditions: Eye diseases, refractive errors, myopia, hyperopia, astigmatism; C11.744; C11.744.479; C11.744.212; C11.744.636

• Registration Number: RBR-2w7phk
• Lead Sponsor: Faculdade de Medicina do ABC

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2016-05-23
• Last Update Posted: 29 May 2023

Recruitment & Eligibility

• Status: Data analysis completed
• Sex: Not specified
• Target Recruitment: Not specified

Inclusion Criteria

Volunteers of both gender ; aged between 18 and 50 years; formal indication for bilateral PRK with preoperative visual acuity of 1.0 in both eyes and the difference between the spherical equivalent refractive error of the eye of each less than 1 diopter .

Exclusion Criteria

Patients with known or suspected keratoconus ; with cataracts ; people with corneal diseases ; ametropies greater than 8 negative diopters or greater than 4 positive diopters or greater than 4 cylindrical diopters ; people with amblyopia ; people with strabismus, prior eye surgery history.

Study & Design

• Study Type: Intervention
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Improvement of visual acuity in decimal with the Snellen chart in the sixth postoperative day , which ranged between 0.30 and 0.80 in patients undergoing circular scarification technique and from 0.30 to 1.00 in the subject oval technique.;In 43 patients , it was observed by the subjective analysis questioning each patient, 48.8 % of patients did not notice difference between the eyes and 51.2 % noticed a difference ( 41.9 % perceived better quality of vision in the eye of scarification oval and 9.3 % perceived better quality of vision in the eye of the circular scarification ) .;Regarding the subjective evaluation of biomicroscopy density of epithelial stacking, made ??by the examiner, in 64.3 % of patients had a smaller stack in the eyes submitted to the oval scarification , 31.0 % was not identified difference and in 4.7% of patients there was a higher stacking in the eyes with oval scarification.

Secondary Outcome Measures

Name	Time	Method
Secondary outcomes are not expected