Proclear Multifocal Toric lenses address three primary problems which some patients experience: astigmatism, the inability to see objects up close clearly, and dry eyes often experienced with age and contact lens wear. The design of these lenses as well as the materials used not only provides the patient with a heightened level of comfort, but also the best vision possible taking into account refractive error as well as age concerns.
Presbyopia is a normal part of the aging process which begins to affect patients at around age 40. One third of the refractive ability of the eye resides with the refractive medium of the cornea as light passes through it on its way to the retina. The crystalline lens accounts for the remaining 2/3 of the ability of the eye to see through a process of accommodation which results in the lens changing shape to see objects at different distances. As we approach middle age, the elasticity of the fibers holding the crystalline lens in place loses flexibility. This loss is commonly referred to as presbyopia which literally translates to “old man eye.” Proclear Multifocal Toric lenses accommodate for this deficiency by providing the patient with a prescription to correct for distance, intermediate and near through availing itself of a design which alternates different corrections in alternating concentric rings known as a Balanced Progressive Technology™. This smooth transition of power at any focal distance allows the patient to see objects clearly at any distance without the need for reading glasses or monovision contacts.
Toric lenses are designed to correct the refractive error of astigmatism. The cornea may be more elliptically, or football shaped, than spherical, or roundly shaped. As light passes through this corneal shape, it will focus at two distinct points at the back of the retina. To correct this problem, cylinder is prescribed. Cylinder refers to the correction in the tangential (or vertical plane) of the lens. Spherical powers, which correct for nearsightedness or farsightedness, reside in the sagittal (or horizontal plane). These two meridians of correction are oriented at right angles to one another allowing each ray of light to come to a single focal point allowing the patient clear vision. Proclear Multifocal Toric lenses accomplish this by maintaining a stable design which allows correct to go where it is needed.
Proclear Multifocal Toric lenses also use PC Technology™ which allows water molecules to actually become part of the lens through an ionizing attraction mechanism. This prevents dryness and makes contact lens more comfortable through maintain the fluid environment associated with the corneal tear film. If this layer of tears is not preserved, it will not only result in the eye becoming more susceptible to bacteria and other debris, but will decrease the ability of the eye to see well through disrupting the refractive medium of the cornea.