Cataract Lens Vision Simulator
What separates one type of lens from another is how it handles the light it is not using. The same drive is shown below through four choices, by day and at night. Every eye is different; this is simulated, for educational purposes only, and which lens suits an eye is a discussion with your surgeon.
Found this helpful?
If you are having problems with your vision, please do not drive. See an eye doctor as soon as possible.
WhatsApp usWhat each view shows
- Astigmatism uncorrected · day
- Astigmatism that is left uncorrected smears everything along one axis, whichever lens sits behind it — this is what a toric lens is for.
- Monofocal · day
- One focal point, so almost none of the light is spread and the view stays crisp at the distance the lens is set for.
- Multifocal · day
- The light is divided between focal points, and in daylight the cost of that shows as a small loss of contrast rather than as glare.
- Extended depth of focus · day
- One stretched focal range instead of several separate ones, which in daylight is hard to tell from a monofocal.
- Astigmatism uncorrected · night
- Each light stretches into a streak along one axis, so oncoming headlights and lamps smear rather than ring.
- Monofocal · night
- Street lamps and traffic lights stay small and separate, because the lens puts its light in one place.
- Multifocal · night
- Whatever light is not in use lands as rings around each lamp, which is the trade-off people describe as haloes.
- Extended depth of focus · night
- A single soft halo around each light rather than the distinct rings, and less of one than a multifocal throws.
By day the four are close together; at night they separate, because rings and streaks need small bright lights to form around. The reading distance is a separate question, and this drive cannot show it. More on the types of lens used in cataract surgery, and on what the operation involves.
Ask about your eyes
Send us a message and we will answer. Tell us how you use your eyes and what you would rather not need glasses for.
