The average cataract patient today is far more active than ever before. They demand better performance from their bodies and they require better visual acuity. Increasing the body’s performance levels means greater demands on every bodily function including corrected vision (BCVA) after Refractive or Cataract surgery.
As we age, vision and visual acuity change. During our early twenties our eyesight is the best, offering us better visual acuity better contrast sensitivity and the fewest spherical aberrations we will experience. The human visual system includes the natural cornea, the natural crystalline lens and the fovea, located on the retina. Since the retina is only a receptor for the visual signal that then is transferred via synopsis through the optic nerve to the brain, it cannot change the amount of positive or negative aberrations added when the light travels through the lenses of the eye.
Distance vision is primarily the responsibility of the exterior lens, the cornea, which generally offers positive spherical aberrations and an interior lens, the natural crystalline lens that generally creates negative spherical aberrations, and its purpose of primarily for intermediate and near vision. When a patient has cataract surgery a perfect “Zero Aberration” lens is normally implanted.
In the past, patients were older, with cataracts only removed and an IOL implanted after the patient was nearly blind. Therefore, most patients didn’t notice the difference in the increase of aberrations because they were just happy to see again. Today patients are younger and observe at dawn and dusk “Things are just not as bright as usual.” This is due to reduced light levels, reduced because the new lens does not compensate for the positive aberrations delivered through the cornea.
How it Works
ASPHERICx™ & ASPHERICx Micro™ were developed using advanced optical physics. Studies indicate that by reducing the amount of aberrations in the light waves going through the eye, along with a slight asphercity more rays are focused on the retina.
This translates into better distant vision and better low light vision. Compressing the light into a smaller zone means a greater need for an advanced ergonomic design.