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The Effects of Primary Pterygium on Contrast Sensitivity Preoperatively and Postoperatively

NCT03406390 · Status: UNKNOWN · Type: OBSERVATIONAL · Enrollment: 60

Last updated 2018-01-23

No results posted yet for this study

Summary

Pterygium is the growth of conjunctival tissue onto the cornea, usually from the nasal quadrant of the cornea.Visual acuity may be reduced due to direct invasion of the visual axis or astigmatism induced by the pterygium. Contrast sensitivity measures two variables, size, and contrast which could comprehensively reflect the visual quality of the primary pterygium patients. In this study, we would investigate the the effects of primary pterygium on contrast sensitivity preoperatively and on the 1st, 3rd and 6th month postoperatively, moreover, the related parameters on the contrast sensitivity in the primary pterygium patients would be analyzed.

Conditions

  • Primary Pterygium

Interventions

PROCEDURE

Pterygium surgery

The patients were anesthetized with subconjunctival injection.Symblepharon was released and fibrotic tissue was extensively dissected to expose the sclera and corneal stroma. The subconjunctival fibrovascular tissue, including Tenon's capsule, were thoroughly removed using scissors from the sclera and medial rectus muscle at the area of the superior and inferior fornices and the nasal caruncle. A cryopreserved human amniotic membrane (Zhongshan Ophthalmic Center, China) was then placed on the entire exposed bare sclera with the epithelial side facing upward, and secured with 10-0 nylon sutures.

Sponsors & Collaborators

  • Zhongshan Ophthalmic Center, Sun Yat-sen University

    lead OTHER

Principal Investigators

  • Jin Yuan, Professor · Zhongshan Ophthalmic Center, Sun Yat-sen University

Eligibility

Min Age
20 Years
Max Age
60 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2017-11-01
Primary Completion
2018-11-01
Completion
2018-12-31

Countries

  • China

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03406390 on ClinicalTrials.gov