A Perfect Vision

A cataract is a clouding of the lens of the eye that first blurs vision and can eventually lead to blindness if the lens becomes opaque. The World Health Organization estimates that nearly 18 million people worldwide are blind in both eyes because of cataracts, making this disease the cause of almost half of all cases of blindness. The main culprit is aging: Approximately half of all people older than 80 will suffer from cataracts to some extent. The good news is that femtosecond laser surgery to remove the defective lens and replace it with an artificial intra-ocular lens is increasingly viable. In most cases, the surgery restores vision to the point that the patient has no need for glasses or contact lenses for vision correction. Still, about 30 percent of patients have to wear some form of corrective lens after the surgery. While this may seem like a reasonable outcome, the scientists and engineers at Integrated Scientific Services AG (ISS) knew they could do better. Using knowledge of the structure and material properties of the various parts of the eye, especially the cornea, ISS teamed up with ANSYS to create Optimeyes - a clinical tool for ophthalmologists that runs ANSYS Mechanical in the background to produce patient-specific surgical strategies to improve results.

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