Outcomes of cataract extraction in functionally monocular patients

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Abstract
Purpose: To compare the ocular comorbidities, visual outcomes, and surgical complications between a series of functionally monocular patients who had phacoemulsification and intraocular lens (IOL) implantation and a control group of age- and sex-matched binocular patients. Setting:: Jules Stein Eye Institute and the Department of Ophthalmology, UCLA School of Medicine, Los Angeles, California, USA. Methods: The records of a consecutive series of 100 functionally monocular patients who had phacoemulsification and IOL implantation were reviewed. The records of a control group of binocularly sighted patients who were matched to the monocular patients by age, sex, and date of surgery were also reviewed. Results: Thirteen patients in the monocular group were monocular because of surgical complications. The remaining patients (87%) were monocular from medical conditions. Monocular patients had significantly more ocular comorbidity than binocular control patients (P < .0001). Age-related macular degeneration, diabetic retinopathy, and open-angle glaucoma were the most common reasons for monocular status and the most common ocular comorbidities in study eyes. The median preoperative best corrected visual acuity (BCVA) was 20/50 in the monocular group and 20/40 in the binocular group. The median postoperative BCVA was 20/25 and 20/20, respectively. A final BCVA of 20/40 or worse was the result of preexisting macular pathology or glaucoma in every instance. Surgical complications (P = .096) and the number of postoperative procedures (P = .724) were similar between the 2 groups. Conclusions: Ocular comorbidity was significantly more prevalent in the eyes of monocular patients. Monocular and binocular patients experienced a 3-line improvement in BCVA after cataract surgery; however, the final median acuity was 20/25 in the monocular group and 20/20 in the binocular group. The 2 groups had a similar complication rate.

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