Distribution of preoperative angle alpha and angle kappa values in patients undergoing multifocal refractive lens surgery based on a positive contact lens test
| Autor: | Janosch Rinert, Michael A. Thiel, Oliver A. Pfaeffli, Claude Kaufmann, Lucas M. Bachmann, Katja C. Iselin, Philipp B. Baenninger, Frantisek Sanak |
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| Přispěvatelé: | University of Zurich, Baenninger, Philipp B |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
10018 Ophthalmology Clinic
medicine.medical_specialty Visual acuity genetic structures Refractive lens surgery Contact Lenses 2804 Cellular and Molecular Neuroscience Visual Acuity 610 Medicine & health Refraction Ocular Angle alpha 2809 Sensory Systems Cellular and Molecular Neuroscience Lens Implantation Intraocular medicine Humans Retrospective Studies Lenses Intraocular Phacoemulsification Angle kappa business.industry Consecutive case series Multifocal intraocular lens Middle Aged 2731 Ophthalmology Refractive lens Sensory Systems eye diseases Surgery Contact lens Ophthalmology Refractive Surgery Female medicine.symptom business Kappa Decision-making |
| Zdroj: | Graefe's Archive for Clinical and Experimental Ophthalmology |
| ISSN: | 1435-702X 0721-832X |
| Popis: | Purpose To assess the preoperative objective angle alpha and angle kappa measurements of patients deciding to undergo multifocal refractive lens surgery based on a subjective positive multifocal contact lens test (MCLT). Methods Retrospective, consecutive case series. Alpha and kappa angles were measured using the iTrace aberrometer. All patients also performed a 1-week MCLT. Only patients with a positive MCLT underwent surgery. Visual outcome (UCVA) was obtained in the 1-year follow-up. We assessed the preoperative distribution of angle values within MCLT positive and negative patient groups. Results Two hundred seventeen eyes (111 patients) were included. Mean age was 56.4 years (SD 5.6) and 46.9% were female. In 71 eyes (38 patients), MCLT was positive. Of them, 12 eyes (17%) had an angle alpha and angle kappa ≥ 0.5mm. Of 146 eyes (73 patients) who refrained from surgery due to a negative MCLT, 71 eyes (48.6%) had both angles small (pn=24) with high alpha but low kappa sizes improved less (−0.31 logMAR (SD 0.13; p=0.019)). Conclusion Four out of five patients with a positive MCLT also had correspondingly small angle values. One-half of patients with low preoperative angle values refrained from surgery due to a negative MCLT result. One-year visual acuity improvement was substantial and independent from angle sizes. |
| Databáze: | OpenAIRE |
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