Keratoconus is a non-inflammatory ectasia or protrusion of the cornea. Over a period of years (from a few years to 5 or more years) the cornea tends to thin and steepen. As the cornea thins and steepens, the patient will experience a decrease in vision which can be mild or severe. For mild to moderate degrees of keratoconus, eyeglasses or soft contact lenses may be able to provide the patient with clear comfortable vision. However, in the more advanced cases of keratoconus, eyeglasses or soft contact lenses will not be able to provide the patient with clear vision. In addition, conventional gas permeable contact lenses may be able to provide clear vision but these lenses tend to be unstable on an advanced keratoconic cornea.

In the great majority of the patients that we see with advanced keratoconus, the outer cellular layer of the cornea known as the epithelium is compromised or not intact. For this reason patients with advanced keratoconus will not be able to tolerate or support a soft, hybrid or conventional gas permeable lenses. With these lens designs the vision may be acceptable but the comfort will not be. Also, the small gas permeable lenses may tend to pop out of the eye or have excess movement causing discomfort and eye pain after a short wearing period.

The only lens that will provide clear stable vision, and excellent comfort to a patient with advanced keratoconus will be a gas permeable scleral lens, specifically a GVR Scleral lens. This is due to the fact that the GVR Scleral lens does not touch the compromised cornea. Instead, the GVR Scleral lens vaults over the cornea and is supported by the white portion of the eye known as the sclera. The space between the back of the lens and the front surface of the cornea is filled with unpreserved sterile saline solution. In other words, the front of the eye is always in a moist environment. Because of this, very often the GVR Scleral lens will act as a therapeutic device and help the compromised corneal tissue heal. In addition, the blinking action of the eyelids against the irritated cornea can cause further damage to the cornea. The GVR Scleral lens will protect the compromised cornea from the rubbing action of the eyelids against the irritated cornea.

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Optimum Infinite Gas Permeable Material

I am happy to announce that our Global Vision Rehabilitation Center will be designing and fitting all of our “high need” patients with the Optimum Infinite gas permeable contact lens material. The Optimum Infinite material is the most oxygen permeable material ever to be approved by the FDA. In addition, this newly FDA approved material includes a UV lens blocker. Now for the first time, with certain patients, wearing a scleral lens made with the Infinite material under extended wear conditions can be considered.

SMAP 3D Scleral Lens Design

NEW: Powerpoint presentation on SMAP 3D

Last year we introduced an exciting piece of technology that has allowed us to custom design a scleral lens much more accurately. It is the SMAP 3D, which is a computer attached to a dedicated camera that allows us to obtain a 3 dimensional image of the entire front surface of the eye, including the cornea and the surrounding white portion of the eye (the sclera). Up until now there has not been any technology that would allow us to measure the ocular curvatures outside the cornea. The SMAP allows us to do this. Read More

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Blurred Vision, Burning Eyes: This Is a Lasik Success?

EyePrint Pro

EyePrintPro technology creates a scleral lens based on a mold of the cornea. The molding is accurate to 1 or 2 microns and fits perfectly because it exactly mirrors the irregularities of the individual corneal surface. The technology is well suited for post-Lasik, Keratoconus, RK, eye injury, and corneal transplant patients. Read More in this PDF about EyePrintPro Scleral Lens Technology

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