Frequently Asked Questions

Soft contact lenses are thin and easily conform to the eye. They are generally made from a type of plastic called hydrogels, or silicon hydrogels. These lenses have been commercially available since the 1970’s and are the most popular type of contact lens. They are generally very comfortable and come in several different modalities including daily disposable, bi-weekly or monthly disposable, and rarely quarterly disposable.


Dr. Day will determine which type of soft contact lens is best suited for your visual needs and lifestyle.

You may have heard of Rigid Gap Permeable contact lenses from your grandmother, which might make you think they are old technology, long forgotten in a dusty box of antique artifacts. This couldn’t be further from the truth; RGP lenses are making a major comeback.

 

Some contact lens wearers require a custom-designed contact lens that fits exactly to the curvature of their cornea. In these cases, we work with a lab to create a Rigid Gas Permeable lens to attain the best vision possible. If this type of lens best fits your needs, we will need to take several measurements in order to provide all the necessary information for the lenses to be designed. This process can take several days, but in the end, you have lenses that fit like a glove!

Scleral lenses are large-diameter rigid gas permeable lenses. They can range from 14 mm to over 20 mm in diameter. They are called “scleral” lenses because they completely cover the cornea (the clear dome of tissue that covers the colored part of the eye) and extend onto the sclera (the white part of the eye that forms the outer wall of the eye).

 

In some patients, corneal tissue is damaged. Scleral lenses trap a reservoir of fluid behind the lens. This fluid protects the cornea, and may even allow it to heal in some cases. Corneal lenses can become decentered, and may even become dislodged. Since scleral and corneoscleral lenses extend under the upper and lower lids, they rarely dislocate.

 

Patients with irregular corneas, patients with conditions that affect the tear film, and patients with refractive error (nearsightedness, farsightedness, or astigmatism) who are unable to wear other forms of correction could benefit from scleral lenses.

People with nearsightedness & astigmatism have traditionally needed to depend on glasses & contact lenses to obtain clear vision to perform important daily tasks. Recent developments in refractive surgeries such as LASIK have allowed many people to have improved vision. But this is not always appropriate for everyone. To be a candidate for surgical treatment, a person should have a history of stable prescription changes for several years, and be a minimum of 18 years of age.

 

Now, there is an alternative that can offer reduced dependence or complete freedom from glasses and contact lenses during waking hours, without the need for surgery & its potential side effects. Ortho-K (Orthokeratology or Gentle Corneal Molding), and is achieved with very specialized contact lenses, which cause precise, predictable changes in the optical surface of the eye, resulting in correction of vision defects. The technique is comfortable & reversible, unlike surgical methods. You also do not have to be 18 years of age or older to start!

 

Many people are able to wear Ortho-K contacts while sleeping and remove the lenses when awake, and have good vision. As time passes the memory of the corneal shape change is enhanced and the correction lasts longer into the day. It is not uncommon for a person to have good vision through the entire day, without changes.