Lagophthalmos: the eye that does not close completely
Quick facts
- Definition
- Inability to close the eyelids completely, leaving part of the eye exposed.
- Causes linked to HOF
- Unwanted effect of toxin on the orbicularis muscle or a prior eyelid alteration.
- Risk
- Dryness and irritation of the cornea.
- Management
- Assessment by the professional and, if there are symptoms, referral to an ophthalmologist.
Lagophthalmos is the inability to close the eyelids completely. Even when blinking hard or sleeping, a gap remains and the eye is partly exposed. The main risk is dryness of the cornea, which can cause burning, redness, tearing and, if prolonged, injury to the surface of the eye.
When does it enter the HOF conversation?
The most cited cause is the unwanted effect of botulinum toxin on the orbicularis oculi muscle, which is responsible for closing the eyelid. There are also earlier causes, such as eyelid surgery, paralysis of the facial nerve, thyroid disease and changes in the eyeball. That is why the medical history and the eyelid exam matter before any procedure in the area.
What to do if it appears?
If the patient reports burning, persistent redness, a gritty feeling or blurred vision, referral to an ophthalmologist is the priority. Lubrication and eye protection are advised by a qualified professional. The neighboring topic is eyelid ptosis, in which the upper eyelid droops, and the full story is in complications with toxin.
Frequently asked questions
What is lagophthalmos?
It is when the eyelid does not close completely, leaving a gap with the eye exposed. The main problem is dryness of the cornea, which needs prompt attention if there is pain, redness or blurred vision.