Status:
UNKNOWN
Laser Correction of Astigmatism Using Vector Analysis
Lead Sponsor:
Assiut University
Conditions:
Astigmatism
Eligibility:
All Genders
18-40 years
Brief Summary
To determine the effectiveness of correcting astigmatism by laser refractive surgery by a vectorial astigmatism outcome analysis that uses 3 fundamental vectors : target induced astigmatism vector ( T...
Detailed Description
Astigmatism is a condition of the eye where the cornea (clear window in front of the eye) has 2 different curvatures (much like an American football cut in half) so that, instead of being a single foc...
Eligibility Criteria
Inclusion
- At least 18 years of age .
- Stable eyeglass and contact lenses prescription for at least 2 to 3 years .
- Stable vision over at least the past year .
- No history or findings of active corneal disease .
- No significant dry eye .
- Not pregnancy or nursing .
- Refractive cylinder more than -1D (Diopter) .
Exclusion
- Certain conditions make the method inadvisable :
- Residual , recurrent or active ocular disease such as uveitis , sever dry eyes , sever allergic eye disease , glaucoma visually significant cataract , and retinal disease .
- Previous corneal surgery or trauma within the corneal flap zone .
- Patent corneal vascularisation within 1mm of the corneal flap zone .
- Age less than 18 years old .
- Pregnancy or breast feeding .
- Certain medical conditions such as autoimmune diseases (eg. lupus , rheumatoid arthritis), immunodeficiency states (eg. HIV) and diabetes may prevent proper healing after a refractive procedure.
- Systemic medications likely to affect wound healing such as retinoic acid and steroids .
- Keratoconus or other active eye disease .
Key Trial Info
Start Date :
July 1 2021
Trial Type :
OBSERVATIONAL
Allocation :
ESTIMATED
End Date :
August 1 2022
Estimated Enrollment :
50 Patients enrolled
Trial Details
Trial ID
NCT04913883
Start Date
July 1 2021
End Date
August 1 2022
Last Update
June 4 2021
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