U.S. doctors online nowAsk doctors free
A 52-year-old member asked:

When i look at the sunlight, i get really dizzy and my eyes start to strain. is this normal?

2 doctor answers2 doctors weighed in
Dr. Daniel Goldberg
Specializes in Ophthalmology
Yes: Yes. You are experiencing ciliary spasm. The normal ocular response to light is pupillary constriction, in order to limit the amount and intensity of light entering the eye, so as to protect the internal structures of the eye from the toxic effects of ultraviolet wavelengths which damage cells and dna. In normal ambient room light, the pupillary constriction is a gentle reaction. If you suddenly go out into broad daylight, you may feel that sensation of glare and immediately squint your eyes in order that your eyelids may help limit light entry. If you look directly at a bright light source such as the sun, your pupils will quickly and suddenly constrict, less gently than in room light. The force of this constriction strains the internal ocular muscles, the ciliary body which are responsible for constricting the pupil. This sudden effort causes spasm and strain which may also cause photophobia and headache. This is all a normal part of your body’s involuntary attempts to protect you.
Dr. Richard Bensinger
Ophthalmology 53 years experience
Depends: There are many built in defenses against looking directly at sun, so you might be having an exaggeration of normal defense. If this happens every time and is not part of extraordinary sun gazing, you might consider having a visit with your ophthalmologist to see if there is any problem starting with your eyes.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated Sep 28, 2016

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.