Journal of cataract and refractive surgery · 2004
Secondary procedures after presbyopic lens exchange.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Leccisotti Antonio
Аннотация
PURPOSE: To assess the indications, incidence, and outcome of secondary procedures after presbyopic lens exchange (PRELEX).
SETTING: Private practice, Siena, Italy.
METHODS: This prospective nonrandomized single-surgeon study comprised 52 patients having PRELEX by phacoemulsification and multifocal intraocular lens (IOL) implantation. The preoperative mean spherical equivalent (SE) was +2.50 diopters (D) +/- 1.38 (SD) (range 0 to +6.0 D).
RESULTS: Monocular PRELEX was performed in 8 patients who canceled the fellow-eye surgery because of halos; in this group, the residual refractive error was corrected by photorefractive keratectomy (PRK) in 4 eyes, but this did not alleviate halos and IOL exchange was ultimately needed in 7 eyes. Binocular PRELEX was completed in 44 patients; in this group, 14 eyes (8 patients) had PRK for a residual error. The postoperative mean absolute SE in the 18 PRK-treated eyes was 0.33 D (95% confidence interval [CI] of improvement, 0.57-1.32) and the mean uncorrected visual acuity, 0.8 (95% CI of improvement, 0.32-0.45). The final SE was within +/-0.5 D in 15 eyes (83.0%) and within +/-1.0 D in 18 eyes. Halos after PRK were unchanged in 6 patients, slightly improved in 4, and improved in 2. Photorefractive keratectomy or IOL exchange was needed in eyes with a preoperative SE between plano and +1.75 D (15/40 eyes, 38%) and not needed in eyes with a preoperative SE greater than +1.75 D (0%) (95% CI of difference, 23%-53%).
CONCLUSIONS: Presbyopic lens exchange in eyes with emmetropia and low hyperopia was associated with a significantly higher percentage of secondary procedures. Photorefractive keratectomy enhancement can improve distance vision but has a limited effect on halos.
SETTING: Private practice, Siena, Italy.
METHODS: This prospective nonrandomized single-surgeon study comprised 52 patients having PRELEX by phacoemulsification and multifocal intraocular lens (IOL) implantation. The preoperative mean spherical equivalent (SE) was +2.50 diopters (D) +/- 1.38 (SD) (range 0 to +6.0 D).
RESULTS: Monocular PRELEX was performed in 8 patients who canceled the fellow-eye surgery because of halos; in this group, the residual refractive error was corrected by photorefractive keratectomy (PRK) in 4 eyes, but this did not alleviate halos and IOL exchange was ultimately needed in 7 eyes. Binocular PRELEX was completed in 44 patients; in this group, 14 eyes (8 patients) had PRK for a residual error. The postoperative mean absolute SE in the 18 PRK-treated eyes was 0.33 D (95% confidence interval [CI] of improvement, 0.57-1.32) and the mean uncorrected visual acuity, 0.8 (95% CI of improvement, 0.32-0.45). The final SE was within +/-0.5 D in 15 eyes (83.0%) and within +/-1.0 D in 18 eyes. Halos after PRK were unchanged in 6 patients, slightly improved in 4, and improved in 2. Photorefractive keratectomy or IOL exchange was needed in eyes with a preoperative SE between plano and +1.75 D (15/40 eyes, 38%) and not needed in eyes with a preoperative SE greater than +1.75 D (0%) (95% CI of difference, 23%-53%).
CONCLUSIONS: Presbyopic lens exchange in eyes with emmetropia and low hyperopia was associated with a significantly higher percentage of secondary procedures. Photorefractive keratectomy enhancement can improve distance vision but has a limited effect on halos.