September 2014

Astigmatism, toric lens, corneal curvature, contact lens - A State of Sight #7

Isaac Porter, MD explains that astigmatism is an uneven curvature of the eye that can be corrected with glasses, contact lenses, LASIK, or cataract surgery with toric lens implants. Astigmatism is very common and many patients do not understand what it is. In this episode of A State of Sight, astigmatism is clearly defined in an understandable way.

LASIK vs. PRK, laser vision correction, LASEK, epi-LASIK - A State of Sight #6

Isaac Porter, MD explains the differences between LASIK and PRK and the advantages of each procedure in A State of Sight. Many patients will have a choice between LASIK and PRK when they decide to have laser vision correction. In this episode, Dr. Porter outlines the differences that can help patients decide between the two procedures. Some patients with thin corneas may not qualify for LASIK, so their only option is PRK. Others with outer layer corneal haze (anterior basement membrane dystrophy) may benefit more from PRK than LASIK. LASIK may be preferred in patients that are very nearsighted to reduce the risk of haze after surgery.

PDEK, New inner-layer cornea transplant technique - A State of Sight #92

Pre-Descemet's Endothelial Keratoplasty (PDEK) is a new type of corneal transplantation that can be used for patients with swelling or edema of the cornea. This technique is a variation of Descemet's Membrane Endothelial Keratoplasty (DMEK), and is less like Descemet's Stripping Endothelial Keratoplasty (DSEK).

Watch this episode of A State of Sight with Isaac Porter, MD to learn more about this exciting new technique. This method was first reported by Dr. Amar Agarwal based upon ideas that Professor Harminder Dua first developed when he discovered a previously unknown Dua's layer of the cornea.

LASIK qualifications. What is a free LASIK evaluation? - A State of Sight #5

Isaac Porter, MD explains the tests and evaluation needed to determine if a patient is a candidate for LASIK or PRK. In a free evaluation, the stability of the eyeglass or contact lens prescription is checked to ensure that it is not currently changing. Specialized mapping of the cornea shows detail of the curvature of the eye and can help identify problems like keratoconus that do not qualify for LASIK. Wavefront testing passes light in and out of the eye to measure every distortion in the vision. The thickness of the cornea is measured and an eye exam is performed to check the overall health of the eye. Using this information, it can be determined if a patient qualifies for laser vision correction.