Effect of Single Incision Versus Three Planned Incisions to Reduce Pre-operative Astigmatism After Phacoemulsification.
- Conditions
- Astigmatism of Both Eyes
- Interventions
- Procedure: Planned incisions during phacoemulsification
- Registration Number
- NCT05457348
- Lead Sponsor
- Suleman Roshan Medical College
- Brief Summary
Cataract surgery by phacoemulsification is the most commonly performed procedure in Pakistan. Cataract surgery aims for visual rehabilitation and freedom from all kinds of eyewear. Pre-operative corneal astigmatism greater than 1.0 Diopter is reported in 42% preoperatively and 58%postoperatively after implanting a monofocal intraocular lens(IOL). Visual acuity tended to worsen postoperatively with increased astigmatism4. Different treatment modalities are used to reduce astigmatism, like toric IOL. Limbal relaxing incision, actuate keratotomy, intrastromal rings, Lasik and femtosecond laser. Most of these modalities are expensive, so they cannot be afforded by the patients as Pakistan is a low-income country with a per capita income of US$1,562 (160th worldwide)
- Detailed Description
According to the 2020 estimate, 33·6 million adults aged 50 years and older were blind with cataracts as a leading cause (15·2 million cases). According to Pakistan national blindness survey, cataract is the leading cause of blindness in Pakistan. Cataract surgery by phacoemulsification is the most commonly performed procedure in Pakistan. Cataract surgery aims for visual rehabilitation and freedom from all kinds of eyewear. Pre-operative corneal astigmatism greater than 1.0 Diopter is reported in 42% preoperatively and 58%postoperatively after implanting a mono-focal intraocular lens(IOL). Visual acuity tended to worsen postoperatively with increased astigmatism. Different treatment modalities are used to reduce astigmatism, like toric IOL. Limbal relaxing incision, actuate keratotomy, intrastromal rings, Lasik and femtosecond laser. Most of these modalities are expensive, so they cannot be afforded by the patients as Pakistan is a low-income country with a per capita income of US$1,562 (160th worldwide). Our study aims to compare the results of phacoemulsification cataract surgery with a planned three (one 2.8 mm and two 2.0mm) on the or near to steep meridian incisions ( group A) with convention supero-temporal 2.8 mm clear corneal incision(Group B) for the correction of postoperative astigmatism. We hypothesize that a planned three (one 2.8 mm and two 2.0mm) on the or near to steep meridian incisions ( group A) is better than conventional supero-temporal 2.8 mm clear corneal incision(Group B) for the correction of postoperative astigmatism at a significant level of 0.05.
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 160
Cataract patients aged between 50 and 80 years having 1.0 diopters (D) or greater of regular corneal astigmatism documented by keratometry.
- Previous ocular surgery. 2. previous ocular trauma. 3. Pre-existing ocular disease. 4. High intraocular pressure (IOP) 5. Corneal opacity. 6. Strabismus 7. Amblyopia 8. Diabetes mellitus 9. Irregular astigmatism.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Group A:experimental group Planned incisions during phacoemulsification those who receive planned incisions Group B:Controlled group Planned incisions during phacoemulsification the patients who were operated by conventional phacoemulsification
- Primary Outcome Measures
Name Time Method Reduction in Astigmatism Patients will be assessed at first postoperative day then after one month , three months and six months. Postoperative reduction in astigmatism after phacoemulsification.
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Suleman Roshan Medical College Hospital
🇵🇰Tando Adam, Sindh, Pakistan