It is not uncommon for patients to have difficulty wearing contact lenses for a number of reasons. Due to the individual eye shape, certain conditions or impairments or the aftermath of surgery, some patients are considered to be “hard to fit” as contact lens wearers.
For hard to fit patients that prefer to wear contact lenses however, there are options available that can provide comfortable and effective contact lens wear. This will require a specialized fitting with an eye doctor that is an expert that knows your condition and the various products available to find the right match for your specific condition. You may be considered a hard to fit contact lens candidate if you have one of the following conditions:
- Dry Eyes
- Pellucid Marginal Degeneration
- Post-LASIK or other refractive surgery
- Presbyopia (reduced near vision common in individuals aged 40 and over).
- Corneal Scarring
Scleral contacts are large-diameter gas permeable contact lenses designed to vault over the entire corneal surface and rest on the white of the eye (sclera). The fitting che back surface of a scleral lens acting as a fluid reservoir to provide comfort for people with severe dry eyes who normally could not tolerate contact lenses.
In addition to keratoconus, scleral contact lenses can be used for eyes that have undergone corneal surgery, and for people with severe dry eyes caused by systemic conditions.
What are the benefits and advantages of Scleral lenses?
- Better Comfort- Scleral lenses rest on the white part of the eye (sclera and conjunctiva) and therefore are more comfortable than lenses that rest on the cornea.
- Clear vision- These lenses don’t dry out as the day progresses, a common problem for people who wear soft lenses, especially if they work on the computer for many hours.
- Dry Eye Relief- Scleral lenses have a reservoir of fluid behind the lens that protects the cornea, and may even allow it to heal in cases where the cornea was damaged. These lenses extend under the upper and lower lids and rarely dislocate. They are approximately the same size as most soft contact lenses.
- Irregular Corneas- People who have had LASIK or other refractive surgeries that have been less-than successful or they now find it difficult to read without wearing reading glasses can have improved vision through scleral lenses.
- Keratoconus and Pellucid Marginal Degeneration- these are diseases of the cornea where there is cornea distortion. The scleral lenses create a new, clear, optical surface and enable people to regain clear vision.
- Problems after a corneal graft or corneal transplant- when someone has had a corneal transplant, there is often a considerable amount of astigmatism and distortion. The Scleral lens enables the individual to see once again.
Hybrid contact lenses
Hybrid contact lenses feature a hard (gas permeable) center bordered by a soft outer ring. Hybrid contact lenses may be an option if you have an uneven corneal curve (keratoconus, high astigmatism, post-surgery) or you have difficulty using traditional hard lenses. These lenses typically give you the crisp vision of a gas permeable lens, with the comfort of a soft lens.
Bifocal or multifocal contact lenses
Color Tinted contact lenses
Some contact lenses are tinted, either for cosmetic, theatrical or remedial goals– to boost color perception or help compensate for color blindness, for example. Stay clear of costume or cosmetic contact lenses which can easily be purchased from dubious sources. These lenses can ruin your eyes and create potentially significant eye infections.