Comparison Between Bare Scleral Technique and Conjunctival Auto-graft on Corneal Topography After Pterygium Surgery

NCT ID: NCT05812508

Last Updated: 2023-04-13

Basic Information

• Recruitment Status: UNKNOWN
• Total Enrollment: 30 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2023-04-20
• Study Completion Date: 2023-10-01

Brief Summary

Aim of the work:

To study the corneal topographic pattern changes in patients who have pterygium excision by two surgical techniques (bare sclera, conjunctival autograft).

Detailed Description

Pterygium is one of the common ocular surface disorders , it's is an elastotic triangular fibro-vascular tissue covered by conjunctival epithelium that spreads over the cornea. Pterygium causes differences in curvature & power across the cornea .

The prevalence of pterygium varies from 1.1% to 53% globally in different environmental conditions. Risk factors include;UV radiation, geographical latitude near to the equator, outdoor activity , aging, male, and dusty environment.

Pterygium excision is important in patients suffering from blurred vision due to astigmatism . Surgical techniques include ; bare sclera excision, conjunctival autograft, conjunctival transpositional flap, and amniotic membrane grafting. Pterygium excision increases in the mean central corneal curvature & reduces astigmatism that leads to improvement in visual acuity.

Corneal topography is a gold standard in corneal pathology follow-up. Corneal topography is a computer assisted diagnostic tool that creates a three-dimensional map of the surface curvature of the cornea. Corneal topography produces a detailed, visual description of the shape and power of the cornea.

In this study , corneal topography is used to detect how does corneal curvature change after excision of pterygium .

Conditions

Corneal Topography

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

pterygium surgery with bare scleral technique

corneal topograghy before and after surgery

corneal topography

Intervention Type: DEVICE

corneal topography before and after pterygium surgery by two techniques bare scleral and conjunctival autograft

pterygium surgery with conjunctival autograft technique

corneal topograghy before and after surgery

corneal topography

Intervention Type: DEVICE

corneal topography before and after pterygium surgery by two techniques bare scleral and conjunctival autograft

Interventions

corneal topography

corneal topography before and after pterygium surgery by two techniques bare scleral and conjunctival autograft

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Patients with pterygium not associated with other pathologies (suitable for excision).
• Nasal pterygium extended to the cornea.

Exclusion Criteria

• Associated pathologies such as glaucoma, and cataract.
• Corneal opacities or irregularities, scars, dystrophy or ectasia.
• Patients who underwent previous corneal surgery (including refractive surgery)
• Pseudo-pterygium.

• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Sohag University

OTHER

Sponsor Role: lead

Responsible Party

Zainab Mahmoud Ali

resident

Responsibility Role: PRINCIPAL_INVESTIGATOR

Central Contacts

Zeinab Mahmoud Aly, bechlor

Role: CONTACT

drzeinabmahmoud32@gmail.com

01224483318

Alahmady Hamad Elsamman, MD

Role: CONTACT

01111102698

References

Yilmaz S, Yuksel T, Maden A. Corneal topographic changes after four types of pterygium surgery. J Refract Surg. 2008 Feb;24(2):160-5. doi: 10.3928/1081597X-20080201-06.

Reference Type: BACKGROUND

PMID: 18297940 (View on PubMed)

Other Identifiers

Soh-Med-22-10-02

Identifier Type: -

Identifier Source: org_study_id