RecruitingNot ApplicableNCT06393855

Base Curves of Bandage Contact Lenses and Their Effects on Post Trans-PRK Vision and Pain

Base Curves of Bandage Contact Lenses and Their Effects on Post Transepithelial Photorefractive Keratectomy (Trans-PRK) Vision and Pain： A Prospective Randomized Clinical Trial

Sponsor

Dongyang People's Hospital

Enrollment

36 participants

Start Date

Jun 18, 2024

Study Type

INTERVENTIONAL

Conditions

Myopia

Summary

The objective of this study was to investigate the impact of employing bandage contact lenses with a base curve of 8.4 mm versus 8.8 mm on visual recovery following Trans-PRK in patients characterized by steep corneas and high myopia.

Eligibility

Min Age: 18 YearsMax Age: 40 Years

Inclusion Criteria4

Spherical equivalent refractive error between -6.00 and -8.00 D in either eye.
Astigmatism of no more than 2.0 D in either eye.
Best spectacle-corrected visual acuity (BCVA) according to the logarithm of the Minimum angle of resolution (logMAR) scale of 0 or better in both eyes.
Willing and able to participate in all required activities of the study.

Exclusion Criteria8

Diabetes mellitus.
Systemic connective tissue disease.
Cardiovascular disease, epilepsy.
Eyelid abnormalities.
Corneal disease.
Glaucoma.
A history of ocular disease.
Noncompliance with measurement at enrollment.

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Interventions

PROCEDUREsingle-step Trans-PRK

Both eyes were treated consecutively in each patient by single-step Trans-PRK performed by SCHWIND Amaris 500 S excimer laser platform (SCHWIND eye-tech-solutions GmbH, Kleinostheim, Germany). Topical Proparacaine Hydrochloride Eye Drops 0.5% (Alcaine, Alcon, Fort Worth, TX, USA) were used to anesthetize the eyes, and use povidone-iodine to disinfect the eyelid skin. After a lid speculum had been inserted, and the other eye was blocked. Epithelial and stromal ablations were performed using a single continuous laser shooting session on an excimer laser platform. After the appeals step, Mitomycin C 0.02 % was applied to the stromal surface for 20 s, then rinse with cold salt water.

BEHAVIORALPlacing a bandage contact lens on the cornea, with an 8.4-mm base curve in right eye and one with an 8.8-mm base curve in the left eye.

After surgery. A contact lens placed on the cornea, with an 8.4-mm base curve in right eye and one with an 8.8-mm base curve in the left eye.

BEHAVIORALPlacing a bandage contact lens on the cornea,A contact lens placed on the cornea, with an 8.8-mm base curve in right eye and one with an 8.4-mm base curve in the left eye.

After surgery. A contact lens placed on the cornea, with an 8.8-mm base curve in right eye and one with an 8.4-mm base curve in the left eye.