Refractive Lens Exchange is today one of the most popular refractive surgical approaches. With this special issue we aim to make a complete update on the topic from the indications to the ethical limits for the practice of this type of refractive surgery

Número especial dedicado a la lensectomía refractiva que incluye indicaciones, contraindicaciónes, uso de nuevas fórmulas, prevención de complicaciones, selección de lentes intraoculares y barreras éticas para la indicación basada en evidencia científica.

Entre las enfermedades oculares más prevalentes, los trastornos de la superficie ocular, la uveítis, el glaucoma, la retinopatía diabética y la degeneración macular relacionada con la edad (que afecta principalmente a las personas mayores, pero también a la población joven y adulta), son causas principales de discapacidad visual y ceguera irreversible en todo el mundo. Muchas de estas patologías no tienen una cura definitiva.

Among the most prevalent eye diseases, ocular surface disorders, uveitis, glaucoma, diabetic retinopathy, age related-macular degeneration (mainly affecting the elderly but also the young and adult population), are major causes of visual disability and irreversible blindness worldwide. Much of these pathologies has no definitive cure. A wide variety of endogenous/exogenous risk factors and pathogenic mechanisms have been identified, but many remain still unknown. Nutritional habits influence the risk of suffering diverse pathologies. The important choice of eating healthy may help counteracting the course of ocular diseases. Several randomized, controlled clinical trials as well as experimental models, have been recently set up to evaluate the efficacy of natural food and nutraceutics as first-line coadjutants for ophthalmic diseases. Bioactive nutrients have been identified as protective factors against eye diseases. Therefore, from the large spectrum of lifestyle influences, dietary habits are increasingly recognized as a modifiable element that may affect a patient's risk of suffering eye diseases. Current understanding (and the areas of ongoing research) about the management of nutrition, nutritional genetics and eye health, and other closely-related issues, are important topics that will be fully considered in this Special Issue.