The Corneal and Conjunctiva Sensation Before and After Pterygium Surgeries

Study Overview
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Brief Summary
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The purpose of this current study is to examine the sensation of the corneal and conjunctiva sensation before and after pterygium surgeries by Cochet bonnet esthesiometer and to examine epidemiological, clinical and imaging factors the influence the sensation

Official Title
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The Corneal and Conjunctiva Sensation Before and After Pterygium Surgeries

Conditions
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Pterygium

Intervention / Treatment
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* Device: Cochet bonnet esthesiometer


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients that suppose to undergo pterigyum surgery Exclusion Criteria: Patients with anterior segment diseases Patients that underwent anterior segment surgeries Patients with 7th nerve palsy

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Screening
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cochet bonnet esthesiometer<br>To examine sensation | Device: Cochet bonnet esthesiometer<br>* Cochet bonnet esthesiometer- To examine sensation<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To sensation before and after pterygium surgeries as measured by Cochet bonnet esthesiometer | The change in sensation in the cornea and conjunctiva after pterygium surgery as measured by Cochet bonnet esthesiometer | Before surgery compare to one week+ one month+three months after surgery | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To examine the change in dry eye syndrome that may predicate the change in sensation after pterygium surgery | Dry eye will be measured by Tear break up time | Before surgery compare to one week+ one month+three months after surgery | 
| To examine the change in dry eye syndrome that may predicate the change in sensation after pterygium surgery | Dry eye will be measured by Schrimer test | Before surgery compare to one week+ one month+three months after surgery | 
| To examine the change in dry eye syndrome that may predicate the change in sensation after pterygium surgery | Dry eye will be measured by lissamine green test | Before surgery compare to one week+ one month+three months after surgery | 
| To examine the change in visual acuity that may predicate the change in sensation after pterygium surgery | Visual acuity will be measured by Snellen chart | Before surgery compare to one week+ one month+three months after surgery | 
| To examine the change in refraction that may predicate the change in sensation after pterygium surgery: | Refraction will be measured by autorefractometer | Before surgery compare to one week+ one month+three months after surgery | 
| To examine the change in anterior chamber that may predicate the change in sensation after pterygium surgery: | Anterior chamber slit lamp examination | Before surgery compare to one week+ one month+three months after surgery | 
| To examine the change in imaging of anterior segment that may predicate the change in sensation after pterygium surgery: | Anterior Chamber Optical coherence tomography( AC-OCT) | Before surgery compare to one week+ one month+three months after surgery | 
| To examine the Recurrence of pterygium | Recurrence of pterygium as examined in slit lamp examination | one week+ one month+three months after surgery | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Cochet bonnet esthesiometer