Burden and Factors Associated with Refractive Errors Post Cataract Surgery at Kilimanjaro Christian Medical Center: A Hospital Based Retrospective Cross-sectional Study
Journal – Ophthalmology Research: An international Journal
Publication date – Apr – 2020
Authors – Livin Uwemeye, William U. Makupa
Keywords – best corrected visual acuity, Cylindrical error, spherical error
Open access – Yes
Speciality – Ophthalmology
World region Eastern Africa
Language – English
Submitted to the One Surgery Index on May 29, 2020 at 8:25 am
Aims: To determine the burden and factors associated with refractive errors after cataract surgery in a training institution.
Study Design: A retrospective cross-sectional study.
Place and Duration of the Study: Kilimanjaro Christian Medical Center Eye department. Northern Tanzania, from January 2016 to December 2017.
Methods: A review of files of all adult patients who have had cataract surgery in 2016 and 2017 was conducted. A total of 626 eyes of 554 patients who had post-operative refraction by experienced optometrists were included. Information were extracted from patients’ files then entered into SPSS version 20 for analysis. The main outcomes were post-operative refraction and best corrected visual acuity.
Results: Mean age was 69.3 years (SD=10.7) and ECCE accounted for 76% of surgeries. At least 84.6% had post-operative refractive error and astigmatism was the most common refractive error (56.8%). Spherical error accounted for 27.8%. Spherical error ranged from -12 to 4DS, mean = -0.42 (SD=1.3) DS and median = 0.00DS. The maximum cylindrical error was -7.5 DC, mean = -1.15 (SD=1.36) DC and median = -1.0DC. At least 56% had spherical equivalent within 1D of emmetropia. A BCVA of 6/18 or better was achieved in 92.8%. Age, poor pre-operative VA, poor presenting VA, astigmatism on keratometry, difference between recommended and inserted IOL, ECCE, grade of surgeon and suturing were associated with refractive errors.
Conclusion: Refractive errors following cataract surgery are common. Best corrected visual acuity outcome was in normal recommended range; however, the magnitude of refractive errors was high and the proportion of patients who achieved a final refraction within 1D of emmetropia was below the recommended range. An effort should be made to lower the prevalence and magnitude of refractive errors associated with cataract surgery in training institutions.
OSI Number – 20427