Patients often tell me that they don’t see as well at night, and have trouble driving. Here’s the technical reason: pupils enlarge under dim lighting conditions. That allows blurrier peripheral rays to enter the eye, which detracts from clear images and increases glare.

Here are tips to minimize these effects:

1. Keep your prescription up-to-date. Even the slightest blur, otherwise not noticeable in daylight, can become annoying in dim lighting.

2. Keep your lenses clean. Dirt and scratches distort light rays that cause glare and blurring, especially at night.

3. For contact lenses: use lubricating/re-wetting drops. Contacts accumulate deposits and dry out by nighttime.

4. When driving:

-. Keep your windshield clean, to reduce glare from light scattered by dirt and film.

– Keep your headlights clean, for better road illumination.

– Use the night setting on your rear-view mirror, to minimize distracting head lights from behind

– Concentrate on the road marking lines (center or shoulder), to reduce glare and reflection.

– Direct A/C (or heating) vents away from your face, to prevent moving air from drying your eyes.

– If you wear contact lenses, use lubricating drops before you start (remember, eye drops may blur your vision for several minutes before taking effect).