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If translations differ or are incomplete, the Traditional Chinese (zh-Hant) text on this site prevails.
Lens and refraction · K
Choosing an intraocular lens — detail
Monofocal · toric · EDOF · multifocal
Last reviewed: 2026-10-03 · 潘家健醫生
Key points
IOL optical classes include monofocal, toric, EDOF and multifocal — individual preoperative discussion.
No brand names here; newer or costlier models are not automatically best.
Macular disease, severe dry eye or clear glaucomatous field loss usually argue against multifocal and many EDOF designs.
Day-of implant sequence is on the cataract day-of page.
Far
Intermediate
Near
Halos
Macular disease
Monofocal
Best at the targeted distance
Depends on target
Depends on target
Usually fewer (varies)
Often still considered
Enhanced monofocal
Good at target
Often a bit better than standard monofocal
Usually still needs glasses
Generally less than diffractive multifocal; not a guarantee
Often still considered
Toric
Added to any of the above
As base design
As base design
As base design
As base design
EDOF
Good
Good
Fine print often still needs glasses
Mild to moderate; product-dependent
Use with caution
Multifocal / trifocal
Good
Good
Near often needs fewer readers; not guaranteed spectacle-free
More noticeable
Not suitable
For regular corneal astigmatism of about ≥0.75–1.00 D a toric lens may be discussed; about 1° of rotation loses roughly 3.3% of the cylinder correction. The newest model or a higher fee is not automatically the best fit. Macular disease, severe dry eye, or clear glaucoma visual-field loss: multifocal and most EDOF designs are not suitable. Brand choice is an individual preoperative discussion. This page lists no product names. The order of implantation on the day is on The day of cataract surgery and lens implantation. This page still covers optical classes only, and lists no product names.
This is general medical information, not a diagnosis, and cannot replace an in-person consultation with a registered ophthalmologist, refraction, or a dilated fundus exam. It is not advice to use any medicine or undergo any procedure. Medicines (including off-label use), laser or surgery must be decided by a registered doctor after examination, according to indications and Hong Kong registration. Figures from the literature are published averages, not any clinic’s results. This site does not book, prescribe or refer. Do not change treatment on your own.
