Clinical Cohort Study of Association Between Steady State Phenytoin Treatment and Better Clinical Parameters of Glaucoma
Trial Snapshot
- Phase
- Not Applicable
- Sponsor
- Rabin Medical Center
- Enrollment
- 200
- Locations
- 1
- Primary Endpoint
- peripapillary RNFL thickness
Study Overview
Brief Summary
since glaucoma is considered an optic neuropathy, new treatments for glaucoma are being continuously investigated, including neuroprotection.
Previous studies implied that phenytoin, a potent anti-convulsive drug, has a neuroprotective role, and Na+ channels blockage was suggested as a possible mechanism.
This study predicts that glaucoma patients taking Phenytoin will have a less advanced glaucoma as compared to patients not taking the drug. Glaucoma severity will be determined by visual acuity, visual fields, optic disc cupping and nerve fiber layer thickness
Detailed Description
The study will examine adult patients who suffer from glaucoma and epileptic disorders on the same time. the study group will include glaucoma patients, being treated with oral Phenytoin for their epileptic disorder. The study group will be compared to 2 control groups:
- Glaucoma patients with epileptic disorder,receiving different medication than Phenytoin
- Glaucoma patients with no epileptic disorder.
4 parameters will be evaluated for all groups:
- Best corrected visual acuity
- Optic disc cupping
- visual fields and general perimetric indices
- peripapillary retinal nerve fiber layer.
Every participant in the study,after giving his informed consent, will be evaluated by a senior ophthalmologist in a single office appointment. The appointment will include a visual acuity, complete ophthalmic examination,Humphrey perimetric visual field testing and peripapillary RNFL thickness measurement by OCT.
no drug or other treatment will be given to the participants
Study Design
- Study Type
- Observational
- Observational Model
- Cohort
- Time Perspective
- Cross Sectional
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Clinical diagnosis of glaucoma
- •chronic treatment with phenytoin for any indication
Exclusion Criteria
- •pregnancy
- •visual acuity less then 6/60
Outcomes
Primary Outcomes
peripapillary RNFL thickness
Time Frame: immediate
Secondary Outcomes
- corrected pattern standard deviation in perimetric visual field(immediate)