Monofokal

Monofokal is an adjective used in optics to denote a design or system with a single focal length. The term is commonly used in both ophthalmology and photography to describe equipment or lenses that are fixed to one distance rather than adjustable.

In ophthalmology, monofokal intraocular lenses (IOLs) implanted during cataract or lens-replacement surgery provide a single, fixed focal point, most commonly optimized for distance vision. Patients implanted with a monofokal IOL typically achieve clear distance vision but require correction (glasses or contacts) for near tasks such as reading, unless additional procedures or accommodations are used.

In photography and cinematography, a monofokal lens refers to a prime lens with a fixed focal length. Such lenses have no zoom capability and are used where a combination of image quality, light transmission, and large maximum aperture is desired. They are generally smaller, lighter, and less complex than zoom lenses, and they encourage movement and composition rather than focal length changes.

Compared with multifocal or extended-depth-of-field designs, monofokal optics emphasize a single focus with fewer diffraction-related visual disturbances, but at the cost of reduced flexibility in focal range. The choice between monofokal and multifokal options depends on patient needs, lifestyle, and tolerance for potential side effects such as halos or glare.