Eye diseases, refractive errors, myopia, hyperopia, astigmatism
Conditions
Interventions
Usually, the corneal deepithelization, which is one of the steps of refractive surgery called photorefractive keratectomy (PRK) is made circular in shape.
In this study, with a randomized manner in ea
visual acuity of each eye measured with the Snellen decimal and biomicroscopy evaluation of the cornea, conducted by the medical examiner, on slit lamp, comparing subjectively epithelial stacking.
In
Procedure/surgery
Sponsors
Faculdade de Medicina do ABC
Faculdade de Medicina do ABC
Eligibility
Age
18 Years to 50 Years
Inclusion criteria
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
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.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 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
| Measure | Time frame |
|---|---|
| Secondary outcomes are not expected | — |
Countries
Brazil
Contacts
Public ContactVanessa Sugahara Harada
Faculdade de Medicina do ABC
Outcome results
None listed