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Secondary procedures after presbyopic lens exchange
1Ophthalmic Surgery Unit, Casa di Cura Rugani, Piazza 5o Bersaglieri 2, 53100 Siena, Italy. leccisotti@libero.it
Journal of Cataract and Refractive Surgery
|June 24, 2004
Summary
Presbyopic lens exchange (PRELEX) with multifocal IOLs may require secondary procedures, especially for emmetropia and low hyperopia. Photorefractive keratectomy can improve vision but offers limited relief for halos.
Area of Science:
- Ophthalmology
- Refractive Surgery
Background:
- Presbyopic lens exchange (PRELEX) aims to correct presbyopia and refractive errors.
- Multifocal intraocular lens (IOL) implantation is a common method for PRELEX.
- Secondary procedures may be necessary to address residual refractive errors or visual disturbances.
Purpose of the Study:
- To evaluate the reasons for, frequency of, and outcomes following secondary interventions after PRELEX.
- To analyze the effectiveness of photorefractive keratectomy (PRK) in managing residual refractive errors and halos post-PRELEX.
Main Methods:
- Prospective, nonrandomized study of 52 patients undergoing PRELEX with multifocal IOLs.
- Preoperative spherical equivalent (SE) averaged +2.50 D.
- Secondary procedures included PRK and IOL exchange.
Main Results:
- Secondary procedures were more common in eyes with emmetropia and low hyperopia (preoperative SE 0 to +1.75 D).
- PRK improved uncorrected visual acuity and refractive outcomes (final SE within +/-0.5 D in 83%).
- PRK had a limited effect on halos, with IOL exchange ultimately required in 7 of 8 monocular PRELEX cases experiencing halos.
Conclusions:
- PRELEX in emmetropic and low hyperopic eyes has a higher incidence of secondary procedures.
- PRK can enhance distance vision after PRELEX but is less effective for persistent halos.
- Careful patient selection and management are crucial for optimizing outcomes after PRELEX.