alarm-ringing ambulance angle2 archive arrow-down arrow-left arrow-right arrow-up at-sign baby baby2 bag binoculars book-open book2 bookmark2 bubble calendar-check calendar-empty camera2 cart chart-growth check chevron-down chevron-left chevron-right chevron-up circle-minus circle city clapboard-play clipboard-empty clipboard-text clock clock2 cloud-download cloud-windy cloud clubs cog cross crown cube youtube diamond4 diamonds drop-crossed drop2 earth ellipsis envelope-open envelope exclamation eye-dropper eye facebook file-empty fire flag2 flare foursquare gift glasses google graph hammer-wrench heart-pulse heart home instagram joystick lamp layers lifebuoy link linkedin list lock magic-wand map-marker map medal-empty menu microscope minus moon mustache-glasses paper-plane paperclip papers pen pencil pie-chart pinterest plus-circle plus power pushpin question rain reading receipt recycle reminder sad shield-check smartphone smile soccer spades speed-medium spotlights star-empty star-half star store sun-glasses sun tag telephone thumbs-down thumbs-up tree tumblr twitter user users wheelchair write yelp youtube

Is your pupil safe to drive?

Pupil size is particularly important in determining astigmatic and overall correction; if this changes vision significantly at night due to lighting conditions you’ll want to know before you hand over the car keys.  So who’s at risk for large pupillary changes daytime vs. night?  Those at greatest risk are people who have noticeably larger pupils in the dark, and of course all who have not been tested for a daytime vs. nighttime prescription.  Pupil size is generally larger in younger patients because our pupil shrinks in size naturally as we age.  You can look in the mirror with the lights off and while watching your own pupils (or that of your teen) turn the lights on to know if there is a big difference in pupil size (you’ll see the pupils shrink a lot or a little as the lights go on) .  Below we see the impact vision correction has on seeing one headlight at night (the point spread function in the middle is without correction and on the right is with), but in addition we see some of the measurements interpreted by your 4Sight eye doctor on the left that show if the resulting vision is different between the 3.98mm size pupil vs. 5.47mm.  This standard report is included for every patient who gets a comprehensive annual wellness eye exam at 4Sight iCare.  Call 815-676-4474 to schedule your family’s next eye exam today, and keep your family safe from night-time glare, decreased contrast, and pupil dependent vision changes that go undetected when offices cannot test for day vs. night vision.

is-your-pupil-safe-to-drive-at-night