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Why Are My Eyes Sensitive to Light?

Light sensitivity is also known as photophobia, is a common condition in which natural sunlight or artificial light can cause eye discomfort.   People that experience light sensitivity will find themselves needing to close their eyes or squint when mildly photophobic.  In more severe cases the light can set off headaches and nausea as well.  An eye exam by Dr. Leong or Dr. Bui can help you determine what is the cause of the light sensitivity.  

Photophobia is more common in individuals with light eyes. This is because the greater amounts of pigment in darker eyes help to protect the eye from the harsh rays of light. The darker pigment of the iris and choroid absorbs the light, rather than reflecting the light and causing internal reflection or glare experienced by those with lighter eyes. People with albinism, which is a total lack of eye pigment, also experience significant light sensitivity for this reason. 

Acute photophobia is usually a symptom that accompanies a condition such as an eye infection or irritation (such as conjunctivitis or dry eyes), a virus, or a migraine (light sensitivity is one of the most common symptoms of migraines). It could also be caused by something more serious such as an eye condition like a corneal abrasion, a detached retina, uveitis or iritis or a systemic disease like meningitis or encephalitis. Light sensitivity is also a side effect of refractive surgery (such as LASIK) and some medications (such as tetracycline and doxycycline).  

How to Deal with Photophobia

The most effective way to reduce the discomfort caused by photophobia is to stay out of sunlight and dim indoor lights as much as possible while you are experiencing symptoms. Start by wearing glasses with the appropriate tint (examples include blue blocker coating,  darker tints that are brown or grey, polarized lenses to reduce reflective glare) 

In the summer it is more common for UV to trigger inflammation of the cornea (keratitis) and on the whites of the eyes (conjunctivitis)  which cause photosensitivity as well. Wind and eye dryness can also set off photophobia, which are more good reasons to wear sunglasses. 

If the sensitivity is new and the cause is unknown, you should seek medical attention immediately, especially if you experience any of the following symptoms:  

  • Blurry vision
  • Burning or pain in the eye
  • Fever and chills
  • Confusion and irritability
  • Severe headache
  • Drowsiness
  • Stiff neck
  • Nausea and vomiting
  • Numbness
  • Foreign body sensation

In cases where the photophobia is a symptom of an underlying issue, treating the issue will likely cause relief in your sensitivity. This will vary depending on the ailment but could include pain medications, eye drops or antibiotics, or anti-inflammatory medications. If the sensitivity is mild due to your genetic predisposition or a result of surgery, make sure you take your sunglasses every time you leave the house. People who wear prescription eyeglasses may consider photochromic lenses which automatically darken when exposed to light. 

If you are uncertain what is causing your eye discomfort, consult  Dr. Leong or Dr. Bui to find out the best treatment for you .