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Introduction to Inadequate Lid Seal (ILS)

Numerous conditions such as nocturnal lagophthalmos, FES, Bell’s Palsy, lid laxity, and entropion/ectropion result in the inability to close the eyelids during sleep, which is known to affect dry eye disease symptoms and sleep quality. In most cases, eyelids will close most of the way. However, even a small opening in the eyelids can dry out the eyes. We refer this inability to seal the lids properly as Inadequate Lid Seal (ILS)

Although, the major sign of Inadequate Lid Seal (ILS) is that your eyelids don’t close correctly, there are also other signs and symptoms, including:

Often these symptoms are at their worst in the morning. Over time, Inadequate Lid Seal may damage the cornea from persistent dryness — a condition called keratitis — and increase the risk of corneal ulcers, perforation, and vision loss

Studies have found that people who experience inadequate lid seal have poor sleep quality, mostly likely due to discomfort. Research also indicates that the light entering through open eyelids causes sleepers to awaken from visual stimulation

Contact a healthcare provider if you have symptoms that concern you, like dry eyes, watery eyes or a continual feeling that you have something in your eye. Always contact a provider if you have any change in vision.

If you’ve been diagnosed with inadequate lid seal and you're treating it as directed, contact your provider if symptoms aren’t improving or are getting worse.