An extended depth of focus (EDOF) intraocular lens is designed to provide a continuous range of clear vision, mainly from distance through intermediate, with functional near vision. It stretches the focus rather than creating multiple distinct focal points.
How EDOF IOLs Differ
EDOF lenses use specialised optics to elongate the focal zone, aiming to reduce halos and visual disturbances compared with some multifocal designs. Many patients see well for driving, computer work, and general tasks, needing only mild readers for fine print.
- Often preferred for people who prioritise night driving and intermediate tasks
- May be combined with slight monovision to enhance near performance
- Still require good ocular surface and macular health for best results
- Visual phenomena such as halos can still occur but are typically milder
Choosing EDOF Lenses
EDOF IOLs suit patients who want reduced spectacle dependence without maximising unaided reading at very close distances. Detailed discussion compares them with monofocal and multifocal alternatives.
- Expectations should include possible need for reading glasses for very small print
- Astigmatism correction can be combined using toric EDOF models
- Post-operative fine-tuning with laser is possible in selected cases
- As with all IOLs, long-term follow-up monitors retinal health and capsule clarity
