IOL Vision Simulator

IOL Vision Simulator

See the world through different intraocular lens options — personalised with your own refraction and target.

Educational illustration only — not a medical device and not a substitute for professional advice. Individual results vary.

Your refraction

Left eye (OS)

Plus or minus cylinder convention — both work

Right eye (OD)

Plus or minus cylinder convention — both work

Lens correction

Uncorrected shows raw, unaided vision from Sphere/Cylinder/Axis above. Corrected simulates an implanted lens — pick its type and target below.

Planned postoperative refraction, e.g. 0 for distance or −1.5 for mini-monovision

Lens type

Available as an add-on for every lens type above.

Lighting

Halos around lights are most visible at night, when the pupil is largest.

Left eye (OS)
Right eye (OD)

How it works

The simulated scene contains three focal distances at once: a smartphone held at near range (about 40 cm), a table or laptop at intermediate range (about 65 cm), and a street view at distance. The sphere, cylinder and axis values you enter are applied as optical blur across all three zones, the same way uncorrected refractive error affects real vision. The target refraction is the postoperative result the surgeon plans for — a lens's own sharp focus point(s) sit relative to that target, not always at infinity, which is how deliberate mini-monovision works. Lens types differ in how that blur behaves: monofocal lenses give one sharp focal point with faster blur elsewhere, monofocal plus and EDOF lenses stretch that focus into a wider usable range, and trifocal lenses create three distinct sharp zones at the cost of more visible halos around bright lights at night. The "Uncorrected" option removes all lens structure so you can compare a baseline unaided view against any IOL. Enabling the toric option removes the astigmatic (cylinder) part of the blur, leaving only the spherical component. Lighting changes pupil size, which changes how prominent halos and glare become — most noticeable after dark.