Comparison of SRK-T With Kane Formula for Prediction of Refractive Outcome After Phacoemulsification
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Enrollment
- 70
- Locations
- 1
- Primary Endpoint
- Post-operative refractive outcome in diopters
Study Overview
Brief Summary
Cataract is a leading cause of blindness in the world. Cataract surgery is one of the most commonly performed ocular procedures. We aim to compare the newer generation biometry formula; the Kane formula with the commonly used SRK-T formula for intraocular power calculation in uneventful phacoemulsification surgery to assess the post-operative refractive outcomes at one month post-surgery.
Detailed Description
Purpose: To compare post-operative refractive outcome with Sanders Retzlaff Kraff theoretical (SRK T) and Kane formulae for intraocular lens (IOL) power calculation in cataract patients Study Design: Prospective, interventional study Place and Duration of Study: Department of Ophthalmology, Fauji Foundation Hospital, Rawalpindi Material and Methods: A total of a 70 eyes, 35 in each group will be included in our study. The patients will be randomly divided into two groups. In cases of bilateral cataract, one eye will be included in each group for better control. IOL power calculation in Group A will be done with the SRK-T formula and in group 2 with the Kane Formula. Autokeratometry and A-scan ultrasound will be done for biometry. Inclusion criteria will be uncomplicated cataract in both genders. Exclusion criteria will be ocular trauma, uveitis, previous intraocular surgery, or any retinopathy. All patients will undergo phacoemulsification with foldable lens implantation by two experienced surgeons. Post-operative refractive outcome will be evaluated at one month after surgery. The two groups will be compared.
Results: The results will be calculated by SPSS. Conclusion: A conclusion will be drawn on the basis of our results.
Study Design
- Study Type
- Interventional
- Allocation
- Non Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- None
Eligibility Criteria
- Ages
- 40 Years to 100 Years (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Senile cataract (nuclear, cortical, posterior subcapsular, mature, hypermature cataract)
- •Absence of other ocular pathology causing diminished visual acuity
- •patients above 40 years of age
- •Astigmatism > 2.5 diopters
Exclusion Criteria
- •Retinal diseases
- •Maculopathy
- •Complications during phacoemulsification
- •Combined procedures
- •Previous ocular surgery
- •Secondary cataract
Outcomes
Primary Outcomes
Post-operative refractive outcome in diopters
Time Frame: 1 hour to 1 year
Post-operative refractive outcome will be compared with intended refractive outcome
Visual acuity (Snellen/logMAR) and refractive error (automated refraction in diopters)
Time Frame: 1 month post-operatively
The visual acuity and refractive error of the patients will be measured 1 month post-operatively to compare between the two groups
Spherical equivalent in diopters
Time Frame: 1 hour to 1 year
The spherical equivalent of the patients will be measured 1 month post-operatively to compare between the two groups
Secondary Outcomes
No secondary outcomes reported