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  • Why do I get halos inconsistently when driving at night?


    Why do I get halos while driving at night but only sometimes? I had LASIK surgery two years ago and have mild dry eye. Some nights I'll be fine, then others the lights are giant and blinding—why is it so inconsistent? 


    There are many causes of halo. Depending on your age, early hardening of the lens inside your eye (pre- or early- cataract changes), usually beginning at 50 years of age, can cause this. Astigmatism, dry eye, very wide dilation of the pupil in low light, and even under-correction (return of some of your nearsightedness), can cause halo. I would encourage you to return to your ophthalmologist for a reevaluation to seek out the exact cause.

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