Halos at night

Cause of glare in the nighttime: What are a halo and glare?

A halo is the phenomenon that the light emitted by a streetlight or another light source looks hazy and a dimly circle surrounds the light source like a ring.
After cataract or LASIK surgery, some people become sensitive to glare.
Glare is the phenomenon that the light emitted from a streetlight, the headlights of an automobile, or another light source glares or looks stretched.
If very intense light enters an eye, it occasionally causes an uncomfortable feeling of glare.

Symptoms

If you strongly feel glare due to the impact of a halo or glare, you are likely to feel the eyesight declining in the nighttime or eye strain.

Countermeasures / Improvements

• Use eyeglass lenses exclusively for night use to prevent the symptom.
• Consult an eye doctor about trouble related to glare after surgery.
• When selecting a color of light shielding eyeglasses, try to wear trial lenses to prevent the selection of a color that makes the field of vision excessively dark.
  *Halos and glare can be reduced but cannot be completely eliminated.
  *Colored lenses with a luminous transmittance of less than 75% cannot be used for nighttime driving and on the road.