Blur due to Irregular Cornea
Refractive surgery, corneal transplants, infections and corneal syndromes like Keratoconus are among the many potential causes for irregular corneas. An irregular cornea results in symptoms of blur and distortion that glasses and most contact lenses are unable to correct. Visual symptoms from an irregular cornea are constant, but often worsen in dim light when the pupil is more dilated.
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Worsening Distance Blur Caused By Myopia
Nearsightedness generally means that objects in the distance are blurry. Another term for nearsightedness is “myopia”. It’s been estimated that 20% of all Americans have some degree of the refractive condition called myopia. (more…)
Cross-Section of the Eye
Iowa EyeCare is proud to announce a new contact lens for individuals with keratoconus and other atypical corneas. (more…)
A contact lens may occasionally become dislocated from its normal riding position. Dislocation of a contact lens occurs when the contact lens is dry, when it is fit poorly or, most often, when the eye is rubbed by the lens wearer. The diagram shown here is a cross-section of the human eye. Notice that the space between the eye and the lid extends only a short distance toward the back of the eye. You can see that while a contact lens my become dislocated under the upper or lower lids, it will never become dislodged completely behind the eye.
If you think you may have a contact lens or just piece of a contact lens dislocated in the eye, seek care immediately. Dislodged lens materials should be recovered as soon as possible. Poor lid function, lid tissue irritation, and even infection can result from dislocated contact lens material. The eye doctors at Iowa EyeCare in Cedar Rapids, Marion and Robins, Iowa, are willing to assist you at any time. Iowa EyeCare has a doctor on-call 24 hours a day, 365 days a year. Please call 319-377-2222 if you need our help.
If you have more questions about contact lenses go to Iowa EyeCare’s Contact Lens FAQ Page.
If you are interested in learning more about LASIK surgery in Cedar Rapids, visit Iowa EyeCare’s LASIK FAQ Page.
Look your best . Maximize your performance . Achieve more
If your eye doctor has told you that you’re not a candidate for contact lenses or you’ve tried contact lenses before and stopped, it’s time for you to try again!
The new generations of contact lenses are more comfortable and provide better vision than ever. Most new lenses now have:
New contact lens materials and designs have made contact lenses available to nearly everyone. Contact lenses have been redesigned for nearly all types of vision correction:
Contact lenses are also designed to change or enhance eye color.
Did you know…
Contact lenses will soon help deliver medications to the eye. The goal of the new contact lens drug-delivery system is to provide a constant stream of therapeutic medicine in a way that reduces drug-induced side effects.
All contact lenses are considered a medical device. Even contact lenses without vision correction require a prescription.
Schedule a contact lens consultation with one of our Cedar Rapids eye doctors today.
Learn more about contact lenses:
http://www.iowaeyecare.com/contacts.html
Your questions answered:
Dr. David Christensen
The Iris
The colored part of the eye is actually a combination of two muscles collectively called the iris. The iris functions as a dynamic aperture, allowing only a limited amount of light into the eye. In dim light the dilator pupillae muscle contracts and the sphincter pupillae muscle relaxes, opening the aperture allowing more light to enter the eye. In bright light, the opposite is true; the dilator pupillae muscle relaxes and the sphincter pupillae muscle contracts, closing the aperture allowing less light to enter the eye.
Iris color is a result of pigmentation. Pigment acts to block light from entering the eye. The most common colors are brown, blue and green. Eye color is genetic and is the result of influences from both mother and father, but is not a simple blend of color from both parents. The genetic influences of eye color are not fully understood.
You may not know that eye color can change over time and may a result from several different factors. Many young children are born with light-colored eyes that gradually become darker during the first few years of their life. Other eye color changes may be the result of eye disease. For example, pigmentary glaucoma, Fuch’s heterochromic iridocyclitis, and Horner’s syndrome can all result in changes to eye color. Furthermore, some medications can alter eye color. Prostaglandin glaucoma medications have been known to modify eye color over time. Furthermore, the brilliant colors of youthful eyes can fade and dull over time. If your eye color changes suddenly, please seek care immediately. The eye doctors at Iowa EyeCare always welcome new patients.
Contact lenses now give you a choice in your own eye color. Colored contact lenses are a medical device and require a prescription from an eye doctor. Never purchase lenses from friends or from a beauty shop. The damage from contact lens abuse can cause permanent vision loss. If you are interested in colored contact lenses contact Iowa EyeCare in Marion, Robins, or Cedar Rapids, Iowa, today!
Genetics and Eye Color
Wearing contact lenses can be freeing, and can even increase the quality of life for the wearer. Many people who wear eyeglasses for vision correction would prefer not to have to wear glasses at all. No matter how stylish and in vogue, glasses can sometimes be a burden to wear and care for, and some wearers just can’t get used to them. Contact lenses can be a welcome relief from eyeglasses and give the wearer self-confidence. However, wearing contact lenses requires a great deal of attention and care.
