The effect of pterygium excision on contrast sensitivity and Spherical aberration

Status

Active, not recruiting

Phases

Early Phase 1

Study type

Observational

Source

TCTR

Registry ID

TCTR20150224001

Enrollment

Unknown

Registered

2015-02-24

Start date

2014-01-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

primary nasal pterygium Contrast sensitivity Spherical aberration primary nasal pterygium Contrast sensitivity Spherical aberration

Interventions

Pateint with primary nasal pterygium which involve cornea and not meet exclusion criteria

Basic Science

Primary nasal pterygium

Eligibility

Sex/Gender

All

Age

20 Years to 90 Years

Inclusion criteria

Inclusion criteria: 1. Age > 20 years old 2. Primary nasal pterygium which involve cornea 3. Pterygium excision with conjunctival autograft

Exclusion criteria

Exclusion criteria: 1. History of anterior segment surgery 2. History of ocular trauma 3. Contact lens wear 4. Severe blepharitis 5. Cornea disease Ex keratoconus 6. Cornea scar 7. Retina disease 8. Glaucoma disease 9. Bihead pterygium 10. Recurrent pterygium

Design outcomes

Primary

Measure	Time frame
Contrast sensitivity Pre-operation, post operation 1 month, post operation 3 month Cycle per degree	—

Secondary

Measure	Time frame
Spherical aberration Pre-operation, post operation 1 month, post operation 3 month micrometer	—

Countries

Thailand

Contacts

Public ContactRintra Wongvisavavit

Pince of songkla university

Takano_mew@hotmail.com0879839832

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026