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To Our Valued Patients,

With the evolving situation of the Coronavirus (COVID-19) pandemic and under the guidelines of the Health Officer of the Alameda and Contra-Costa Counties, we will begin the process of re-opening our offices on Monday May 4th in order to provide needed eye and vision care. Moreover, cataract and all other non-cosmetic surgical procedures will soon resume.

Please keep in mind that in order to maintain social distancing protocols and to limit further transmission of the virus, we will be working with a reduced staff and seeing a fewer number of patients as compared to our “normal” schedule. Priority will be given to the most urgent medical cases. We will be implementing a number of measures (including altered check-in/check-out procedures, limiting the number of patients in the office and waiting room, face covering for all persons, temperature screening, etc) that will change your experience in the office. In addition, we will be ramping up our already strict disinfection policies and we will continue to monitor and abide by all local, state and, federal guidelines. Please bear with us through this new reality as these changes are designed to protect you and our staff.

We hope to see you soon and appreciate your trust in us to continue to meet your eye care needs. Stay safe and stay healthy!

The Turner Eye Institute Team






Home » About Keratoconus » Silicone Hydrogel Keratoconus

Silicone Hydrogel Keratoconus

Treating keratoconus can often involve many different methods throughout a patient’s life. A common method early in the treatment of keratoconus is through the use of contact lenses, including silicone hydrogels. Silicone hydrogel contact lenses are contact lenses made of a substance that is super-permeable to oxygen and yet made of a soft flexible substance, known as silicone hydrogel.

For patients with keratoconus, fitting a contact lens can be difficult, silicone hydrogels can often be an important part of the fitting process. In progressed cases of keratoconus, the cornea has become thin to the point where it bulges outward. A contact lens must be fit around this bulge and still maintain proper fit, comfort, centration, and acuity.

Standard rigid gas permeable contact lenses are the simplest fitting choice and are often able to achieve success in early or mild cases of keratoconus. Because of the spherical shape, rigid gas permeable contact lenses provide clear vision when fitted correctly. A rigid gas permeable lens will fit over top the �cone� caused by keratoconus, allowing clear vision.

Piggyback contact lenses requiring a rigid lens and a silicone hydrogel lens are occasionally used to correct keratoconus. At times, a rigid gas permeable contact lens can be uncomfortable, especially for someone with keratoconus. Sometimes a hard contact lens is also unable to remain centered correctly to provide good vision for someone with keratoconus. In these cases, it is occasionally necessary to use two contact lenses simultaneously. A soft lens, often a silicone hydrogel, is placed directly on the eye. This silicone hydrogel lens can provide greater comfort and give a platform for the rigid lens to sit more accurately. A second lens, a rigid gas permeable contact lens, is then placed on top of the soft lens to help maintain the shape further and improve visual acuity further.

The silicone hydrogel lens is important because of its great capacity to allow oxygen to reach the cornea. A standard soft lens would reduce the amount of oxygen that arrived at the cornea causing hypoxia, a unintended side effect that could hasten the onset of keratoconus. A silicone hydrogel lens can provide up to six or seven times the oxygen transmissibility as a standard soft contact lens made of another plastic polymer. The silicone hydrogel is therefore a much safer lens for use with keratoconus.

While silicone hydrogel lenses with a rigid gas permeable can often provide many years of good vision, many patients with keratoconus will eventually require further treatment or may desire a surgical treatment that might allow them more freedom from contact lenses. Turner Eye Institute can provide these other options to assist patients with keratoconus.