What Causes Light Sensitivity (Photophobia)?

Some people feel that their eyes are uncomfortable even at light levels generally considered normal.

Sunlight, car headlights, screens or strong indoor lighting may make daily life more difficult.

This is known medically as photophobia, or light sensitivity.

What Is Light Sensitivity?

Light sensitivity means that the eyes become more sensitive to light than usual.

The person can see the light but also experiences discomfort.

Some people:

• Need to squint
• Cannot feel comfortable without sunglasses
• Experience eye fatigue in bright environments

Can Dry Eye Cause Light Sensitivity?

Yes.

Dry eye is one of the common causes of light sensitivity.

An unhealthy ocular surface may lead to:

• Fluctuations in quality of vision
• A sensation of glare
• Increased sensitivity to light

These effects may occur.

Can Cataract Increase Light Sensitivity?

Yes.

As a cataract develops, the way light is distributed inside the eye may change.

Some people may feel more discomfort particularly:

• In sunny weather
• When driving at night
• When looking at strong light sources

These situations may be more uncomfortable.

Can Migraine and Other Conditions Play a Role?

Yes.

Light sensitivity does not always originate from the eyes.

It may also become pronounced during certain neurological conditions and migraine attacks.

For this reason, assessment should be individualised.

Is Light Sensitivity Permanent?

Not always.

It may vary depending on the underlying cause.

In some people, treating the ocular surface may lead to a noticeable improvement.

In other situations, different causes may need to be investigated.

When Is an Eye Examination Recommended?

An eye examination may be helpful if:

• Your light sensitivity has increased noticeably recently
• It has begun to affect daily life
• It is accompanied by blurred vision or eye pain
• It occurs together with night-vision problems

Conclusion

Light sensitivity can arise for many different reasons.

Dry eye, cataract and other eye problems may underlie the condition.

For this reason, rather than simply trying to reduce exposure to light, it is important to identify the underlying cause and obtain an appropriate assessment.