Blepharitis and blocked oil glands

Gritty. Burning. Like there is sand in there. Crusting on the lashes in the morning.

Blepharitis is one of the most common problems seen in clinic, one of the most under-treated, and — unusually in eye medicine — one where most of the useful treatment is done by you, at home, for free.

What is actually going wrong?

Your tears are not just water. The tear film has three layers: an inner mucin layer that helps tears stick evenly to the eye, a middle watery layer, and an outer oily layer that seals the surface and stops the water evaporating.

That outer oil comes from around 25 to 30 meibomian glands in each eyelid. They run vertically through the lid and open in a neat row along the lid margin, just behind the lashes. Every blink squeezes a little oil onto the tear film.

When those glands block, the oil stops reaching the surface. Tears then evaporate within seconds of a blink, the surface dries, the nerves in the cornea fire, and you get grit, burning and stinging.

Why do the glands block?

Partly age, partly skin type. It is more common with rosacea and with oily skin, and it becomes more common as we get older. The oil itself thickens and stops flowing freely, debris builds along the lash line, and the whole margin becomes inflamed.

It is not caused by poor hygiene, and it is not contagious. People often assume both.

What actually works?

This is the part most people are not given in enough detail to succeed with.

1. Heat, done properly. The oil has to be melted before it can be squeezed out. This is the step that fails most often, because a flannel under the hot tap loses its heat in about thirty seconds and never gets warm enough.

Use a microwavable heat bag made for eyes — every pharmacy sells them. Heat it as instructed and hold it over closed lids for 8 to 10 minutes, once or twice a day. Not two minutes. The glands sit inside the lid and take time to warm through.

It should be comfortably warm, never hot. Check it against your inner wrist first. Burns from overheated compresses are entirely avoidable and we see them far too often.

2. Massage, immediately after the heat. While the lids are still warm, use a clean fingertip to sweep firmly towards the lash margin — downwards on the upper lid, upwards on the lower lid. The glands run vertically, so that is the direction that empties them.

3. Clean the lid margin. After heat and massage, clean along the base of the lashes to remove what you have just released. Use a lid wipe or lid-cleansing foam from the pharmacy. Pull the lid slightly away from the eye and wipe along the lash line, not across the eye. Both lids, both eyes, a fresh wipe for each.

4. Lubricating drops. These do not treat the cause, but they help a great deal. Choose preservative-free if you use them more than about four times a day — preservatives are irritating with frequent use and can keep the problem going. Oil-based or lipid-containing drops work better here than plain saline ones. A gel or ointment at bedtime is very effective if you wake up sore. Use them before symptoms arrive, not only in response to them.

5. Screens and environment. Every 20 minutes, look 20 feet away for 20 seconds and blink fully a few times. Position screens below eye level so less of the eye surface is exposed.

How long before it improves?

Six to eight weeks, and this is the single most important thing to know.

Almost everyone stops too early. The routine feels like a lot of effort for no reward in the first fortnight, symptoms improve somewhere around six weeks, and then people stop — at which point it comes back.

This is a maintenance condition, like brushing your teeth. You are not doing it until it clears; you are doing it to keep it clear.

Can it be cured?

No, but it can be controlled very well. The aim is to keep you comfortable and to stop the complications — chiefly recurrent chalazia, which are a direct consequence of the same blocked glands.

Do I need antibiotics?

Usually not. Most blepharitis responds to the routine above.

For more stubborn cases, particularly with rosacea, a long low-dose course of an oral tetracycline can help — it is used for its anti-inflammatory effect on the glands rather than to kill bacteria. That is a decision to make in clinic.

Next steps

Patients — contact the clinic to arrange an appointment.

GPs and optometrists — refer directly to Limerick or Ennis, including by Healthmail.