Many individuals with “hard to fit” eyes have been told in the past that contact lenses are not a suitable option for their eyes. That is no longer the case. Thanks to advances in contact lens technology there are now a wide variety of specialty contact lenses designed specifically for “hard to fit” eyes.
Hayden Optometric is proud to offer a wide range of specialty contact lenses to suit your unique vision needs. For more information, and to determine if specialty contact lenses might be right for you, please contact us today.
Ortho-k lenses, also known as orthokeratology lenses, are ridgid, gas permeable contact lenses that are used to correct refractive errors overnight. You wear the contact lenses overnight while you sleep, allowing them to temporarily reshape your corneas and correct your refractive error. When you wake up you remove the lenses and are able to go about your day without having to rely on glasses or contacts for clear vision.
Ortho-k is often used as a method of myopia control, and has been shown to reduce the progression of myopia in children.
If you wish to stop treatment simply stop wearing your ortho-k lenses. This will allow your corenas to revert to their natural shape. Ortho-k lenses cannot fix your refractive errors permanently, so it is important for you to wear your lenses every night in order to continue to benefit from clear vision during the day.
Scleral lenses are much larger than standard soft contact lenses. Instead of just covering your cornea they also cover the sclera, or white portion, of your eye. The larger surface area helps make them more comfortable and stable, making them a popular choice for patients with “hard to fit” eyes. Scleral lenses are particularly effective for patients with dry eye disease, since the lens acts as a barrier, reducing evaporation and allowing your eye to retain more moisture.
There are two main types of multifocal contact lenses: Simultaneous vision designs and segmented designs.
- Simultaneous vision designs are divided into specific regions which correct your far, intermediate, and near vision. These regions are mapped out so that objects always appear sharp, regardless of how far or near they are to you. Simultaneous vision design lenses are further subdivided into two types:
- Concentric designs are calibrated so that near and far distance vision rings are arranged in concentric circles on the surface of the lens.
- Aspheric designs are calibrated so that distance or near power is in the center of the lens, and there is a gradual transition to the other powers as you move away from the center of the lens.
- Segmented designs work more like bifocal or trifocal eyeglasses. The central and top portion of the lenses are calibrated to help you view distant objects, while the lower portion of the lense is calibrated to help you view close up objects. Segmented designs are also referred to as alternating or translating designs.
Toric lenses are contact lenses specifically designed to correct astigmatism. Most toric lenses are soft contact lenses, but they are available as rigid gas permeable (GP) lenses as well. The main difference between toric and regular spherical contact lenses is that spherical contact lenses have the same power on all portions of the contact lens. This means that if your lens rotates when you blink your vision will remain unaffected.
Toric lenses have different powers on their different meridians, allowing them to correct the varying amounts of nearsightedness and farsightedness on different meridians of the eye which are associated with astigmatism. To make sure your lenses don’t accidentally rotate (and compromise your vision) toric lenses incorporate a design feature that ensures the lenses always rotate to the correct orientation on your cornea.
Individuals with astigmatism may find that hybrid lenses are best able to meet their vision needs. Hybrid lenses are made up of a rigid, gas permeable central zone surrounded by a soft fitting zone. Correctly fitted hybrid lenses provide the best of both types of lenses recommended for astigmatism: the sharp vision of gas permeable lenses and the comfort of soft lenses.
Hybrid lenses are also a good choice for individuals who play sports. Hybrid lenses are about the same size as toric lenses, and have thinner edges than traditional gas permeable lenses. This means they are significantly less likely to be dislodged during high impact activities.