What MGD does, and what a scleral lens does
Your meibomian glands sit along the edges of your eyelids. They make an oily secretion that coats the surface of the tear film and slows evaporation of the watery layer underneath. When the glands are blocked or the oil changes, the tear film becomes unstable and evaporates too fast, which is why meibomian gland dysfunction (MGD) is a major cause of evaporative dry eye.[1]
A scleral lens works differently from a drop. It vaults over the cornea and holds a reservoir of saline against it. A review of the evidence lists the absence of tear evaporation from the covered cornea among the advantages for dry eye.[2] Another review notes the lens shields the cornea from the environment and helps prevent it drying out, but that the lenses do not address the underlying causes of dry eye.[3]
So with MGD, a scleral lens can calm the part of the eye that usually hurts most. Your eyelids, their glands, the white of the eye beyond the lens edge, and the front surface of the lens are all still exposed to your tear film.
The trade-off: the front of the lens
The front of a scleral lens needs a smooth tear film just as your cornea does. When oil quality is poor, tears can smear or break up over the lens, and vision gets hazy.
The same review that describes the benefits lists the challenges of fitting people with dry eye, including more midday fogging and poor wettability of the lens surface.[2] In a survey of people with dry eye disease, 75% (50 of 67) of scleral lens wearers who answered reported midday fogging or clouding of vision.[4]
For the research on lid disease and fogging in scleral lens wearers, and the difference between front-surface and behind-the-lens fogging, see scleral lenses with blepharitis or MGD. For day-to-day fixes, see midday fogging and dry eyes while wearing sclerals.
Keep treating the lids
Wearers with MGD say the same thing again and again: the lenses are a big help, but they mask symptoms rather than fix the cause. People who do well tend to keep their lid treatment going.
What wearers commonly report doing, with their eye doctor’s guidance:
- A warm compress and lid cleaning before insertion. Some say their lenses smear almost at once if they skip it, especially in allergy season. Others find a shower or washing their face is enough.
- Treatments for the glands themselves, such as in-office heat or light treatments, prescription drops, or supplements their doctor recommended. Experiences vary, and wearers say what helps one person may not help the next.
- Clean hands and lids at insertion. Lotion, face cream, makeup and night ointment can all end up on the lens.
If you want to go deeper on treating MGD itself, our sister site 1-800-dry-eyes.com covers dry eye treatment in general.
What wearers say
Experiences are mixed but lean positive. Many people with MGD, including some with heavy gland loss, describe scleral lenses as the thing that let them work, drive or read comfortably again. A common theme is that it took fit changes, a different fill saline, a surface coating, or a thicker drop in the fill (only on their fitter’s advice) before things settled.
Others have a harder time. Some find their lids feel the lens with every blink, or that the front surface smears within minutes. Some wear their lenses only part of the day or only on certain days. A few say they made their eyes feel worse, and went back to other treatments.
Wearers also point out that people who are doing well post less, so online discussion can sound more negative than most experiences are.
What to ask your fitter
- Is my dry eye mainly evaporative, mainly low tear production, or both?
- Do my glands need treatment before or alongside the fitting?
- Would a surface coating help the front of my lens stay wet?
- Which drops can I use over the lens, and which only with the lens out?
- If my lenses smear, how do we tell lid oil from a fit problem?
- Should I plan a midday removal, rinse and refill?
Common questions
Will scleral lenses make my MGD worse?
Wearers are split. Many long-term wearers with MGD say their lids are no worse, and some say they're better. A few report more lid inflammation. Nobody can predict it for you, so keep your lid routine going and ask your eye doctor to check your glands at your visits. Our page on whether scleral lenses can damage oil glands covers what's known.
Do I still need IPL, heat masks or prescription drops once I have sclerals?
Ask your eye doctor, but many wearers keep them. The lens covers symptoms on the cornea while it's in. It doesn't change how your glands work, and your eyes still have to cope during the hours the lenses are out.
Can I use an oily MGD drop over my scleral lens?
Wearers commonly report that oily or milky drops smear the front of the lens and cloud vision, and some avoid them on coated lenses. Most save them for lens-free hours. Check with your fitter before using any drop over the lens.
Is a bigger lens better for MGD?
Not necessarily. Wearers with MGD succeed with a range of sizes. A larger lens covers more of the white of the eye, but lid shape and other features of your eye matter too. Your fitter chooses the size.
