MEASUREMENT OF CONTRAST VISUAL ACUITY AFTER CATARACT SURGERY
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Abstract
Purpose: Measure contrast visual acuity and affected factors of patients after cataract surgery at Hanoi Eye Hospital 2. Methods: Descriptive cross-sectional study performed on 50 eyes after cataract surgery at Hanoi Eye Hospital 2 from December 2022 to April 2023. Results: The mean age of patients in the study group was 65 ± 9.5 with 24 males and 26 females. The rate of cataract eyes is 54% in the right eye, 46% in the left eye. Cataract grade of the patients are grade 2 (12%), grade 3 (50%), grade 4 (22%), and grade 5 (16%). After surgery, the best corrected visual acuity was in the range of 20/30 to 20/40 (54%), better than 20/30 (18%) and from 20/40 to 20/100. (28%). Contrast visual acuity after surgery significantly improved compared to before surgery and stabilized after 2 months. Most of the eyes had contrast visual acuity within normal limits at low and middle spatial frequencies (1.5 cpg, 3 cpg, 6 cpg) and worse than normal values at high spatial frequencies (12 cpg, 18 cpg). Several factors that affect contrast visual acuity after surgery include age, glare and halos. Conclusion: Cataract is one of the most common eye diseases. Contrast visual acuity measurement takes an important role to improve visual function and enhance quality of life for patients after cataract surgery.
Article Details
Keywords
Cataract, contrast visual acuity, spatial frequency.
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