Is light sensitivity normal after an eye injection?

What's normal

In the first few hours, light often feels harsh. Two ordinary reasons explain most of it. The pupil is usually dilated for the retina exam that goes with the visit, so more light is getting in than usual. And the eye surface is irritated by the povidone-iodine antiseptic, which the ASRS names as the cause of the post-injection feeling that something is in your eye. An irritated, watering eye squints and glares.

That kind of light sensitivity is mild, arrives right away rather than building up, and eases as the dilation wears off and the surface calms down, generally within the same day. Sunglasses and dim lighting handle it. Preservative-free artificial tears help the surface component.

Mild glare in the first hours is common and fades with the dilation. New or increasing light sensitivity after that is a reason to call.

When it stops being normal

Be careful with this symptom, because published guidance treats light sensitivity primarily as a warning sign rather than an expected finding. The ASRS lists increased sensitivity to light among the symptoms that should prompt you to contact your retina specialist, and the AAO tells ophthalmologists to instruct patients to promptly report increased light sensitivity, along with pain, worsening redness, reduced vision and increased floaters, because these may indicate infection inside the eye.

So the rule is: glare in the first hours that is fading needs nothing. Light sensitivity that starts later, that is getting worse, or that comes with pain or blurring at any point in the first week means call the retina office now, not at your next appointment.