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A chalazion is a harmless cyst in the eye lid, that arises from a blocked "oil producing gland" called Meibomian gland. Meibomian glands are sebaceous gland (like the one on the skin, that causes 'acne'), that are located in the eyelid. They secrete oil that helps to moisten the eye. There are about 25-30 glands in each upper and lower lid and they open close to the eyelash. When the opening of this gland gets blocked, the secretions get trapped inside and the gland enlarges. This causes pea sized or larger lumps on the eyelid.
A chalazion presents as gradually enlarging round, firm lump in the upper or lower lid. They can present in one eye or both eyes. There may be multiple lumps.
They do not interfere with vision but in rare cases, a very large cyst can press on the cornea (window of the eye) and cause blurred vision.
Some children are more prone to this cyst, than others and it can occur in any age group. Hormones play an important role in recurring chalazae.
People with Rosacea, Atopy, Seborrhea and Eczema are more prone to chalazae.
Chalazion is not an infection. It is a blocked gland that has trapped secretions inside.
Styes, are painful red lumps that grow on the eyelid margin arising from eye lash follicle or under the lid as a result of bacterial infection. They usually resolve with warm compresses and anti-biotics given orally or as eye drops.
In the vast majority of cases, chalazion resolve on its own without treatment.
If the cyst is very large and remains for a more than 12 months, surgery can release the trapped secretions. However, in children this is not recommended because:
A chalazion can easily take months to reduce in size. They are harmless and can be safely left to get better with time.
The reduction in the size of the lump and when the lump be- comes 'Better felt than seen' is a sign that it is healing.
It is a good idea to monitor the lump by pictures over a period of time so that you can identify the changes over time.
Yes. In rare instances, a very large chalazion can open up on its own to discharge its secretions.
It is important to get medical help from your nearest optometrist, GP or emergency services on such occurrences.
There is some evidence that good lid hygiene, reduced eye rubbing and flaxseed have a role in minimising the recurrence of chalazion.
Last reviewed: 31 December 2021
Next review: 31 December 2024
Author(s): Dr C Ambrose
Version: 1
Approved By: Ophthalmology Department
Document Id: MI 333889