At first glance, a scleral lens and a soft contact do the same job — they sit on your eye and correct your vision. But the way each one works is fundamentally different, and those differences explain why some people thrive in scleral lenses after years of struggling with regular contacts.
Where the lens sits
This is the single biggest difference. A regular soft contact rests directly on your cornea and moves slightly with every blink. A scleral lens vaults completely over the cornea and rests on the white of your eye (the sclera), never touching the sensitive corneal surface at all.
The material
Soft lenses are made from flexible, water-containing hydrogel or silicone hydrogel. They drape over whatever shape your cornea happens to be — which is a problem if that shape is irregular. Scleral lenses are made from rigid, highly oxygen-permeable plastic. Being rigid is actually an advantage: the lens holds its own perfect optical shape instead of conforming to an imperfect cornea.
Vision quality
For a normally shaped eye, soft lenses give good vision. But for an irregular cornea — from keratoconus, scarring, or past surgery — soft lenses can't create a smooth focusing surface, so vision stays blurry. Scleral lenses replace that irregular surface with a flawless one, which is why patients often report their sharpest vision in years.
Comfort and dryness
Soft lenses absorb moisture from your tear film, which can worsen dry eye by day's end. Scleral lenses do the opposite — they hold a reservoir of saline against your eye, keeping it hydrated for hours. For dry-eye sufferers, that difference is life-changing.
Fitting and cost
Regular contacts come in standardized sizes and can often be fit in a single visit. Scleral lenses are custom-designed using detailed measurements and usually require several appointments to perfect. They cost more up front, but they also last longer and solve problems soft lenses simply can't.
Which is right for you?
| Factor | Soft Contacts | Scleral Lenses |
|---|---|---|
| Best for | Regular corneas | Irregular corneas, dry eye |
| Comfort with dry eye | Often worsens it | Often relieves it |
| Vision on irregular corneas | Limited | Excellent |
| Fitting complexity | Simple | Custom, multi-visit |
| Replacement | Frequent | Yearly or longer |
If your eyes are healthy and your prescription is straightforward, soft lenses may be all you need. But if comfort and clarity have always been out of reach, scleral lenses deserve a serious look.
Not sure which category you fall into? Dr. Salley can help you decide. Book a contact lens evaluation at CFE Memphis.