Monofocal lenses provide crisp vision at one chosen distance, usually far, with glasses used for other distances. All multifocal intraocular lenses cause some degree of glare and haloes; the level of tolerability varies from person to person and is not fully predictable, and I will help guide you through this decision. Extended‑depth‑of‑focus lenses offer a smooth range of clarity and may lead to fewer night‑time haloes for many people.

For the technically minded: Extended‑depth‑of‑focus optics modulate longitudinal spherical aberration and the modulation transfer function to maintain image quality across a wider vergence range. Diffractive multifocals split incoming light into discrete foci, increasing photic phenomena; centration, ocular surface quality and expectation‑setting are critical to satisfaction.