Vision

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There is no safe substitute for saline contact solution, according to All About Vision and Dr. Elliott Rosengarten. Some people use tap water or bottled water to clean contact lenses, but water carries microorganisms that may lead to serious eye infections. Baby oil and fruit juice are other bad choices.

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  • Why does eyesight deteriorate with age?

    Q: Why does eyesight deteriorate with age?

    A: Human eyesight deteriorates with age because the essential parts of the eye lose freshness and functionality in time and with extended use. Examples of issues related to decreased function of a specific part of the eye include problems with near-sight vision (otherwise known as presbyopia) and issues reading small text, which is the result of a loss of flexibility in the eye's lens. Age-related diseases can also cause damage to the retina and optic nerve, although age alone does not necessarily damage these parts of the eye.
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  • Can cataracts cause headaches?

    Q: Can cataracts cause headaches?

    A: Headaches are only a symptom of hypermature cataracts, a progressed form of cataracts that have become completely white, according to Medical News Today. At this point, sufferers may also experience inflammation and pain, and the cataracts need to be surgically removed.
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  • Why is my vision blurry sometimes?

    Q: Why is my vision blurry sometimes?

    A: According to WebMD, blurry vision may stem from a number of sources, including an eye injury, nearsightedness or allergies. Hay fever and indoor allergens may also cause blurriness in the vision. Dry eye, pink eye and foreign objects in the eye also cause blurriness.
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  • How does a blind man see?

    Q: How does a blind man see?

    A: Blindness is a broad term used to describe a wide array of visual limitations. Those who are blind see nothing at all. However, in some cases they might be able to experience flashes or flickering images of light and color.
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  • What does the cornea do?

    Q: What does the cornea do?

    A: As described by Healthline.com, the cornea's main function is to refract light entering the eye. St. Luke's Cataract & Laser Institute adds that the refraction of the cornea provides two-thirds of the human eye's focusing power.
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  • What are the main functions of the eye?

    Q: What are the main functions of the eye?

    A: The main function of the eye is to convert light into electrochemical impulses that the brain can interpret as visual images. The various parts of the eye perform different functions that contribute to this purpose.
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  • What is the best human vision?

    Q: What is the best human vision?

    A: The very best human eyes have 20/8 vision, according to LiveScience.com. A person with 20/8 vision can see things as well from 20 feet away as most people can see at a distance of only 8 feet. This is the best vision possible with human eyes.
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  • Why do people sleep with their eyes open?

    Q: Why do people sleep with their eyes open?

    A: People who sleep with their eyes open suffer from a medical condition called nocturnal lagophthalmos. This condition is a type of facial paralysis caused by bodily trauma, stroke, surgery or Bell's palsy. Nocturnal lagophthalmos is a malfunction of the orbicularis muscle in the eyelid. The condition may be temporary or permanent, according to optometrist Dr. Troy L. Bedinghaus.
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  • How long do I have to wait to wear makeup after having pink eye?

    Q: How long do I have to wait to wear makeup after having pink eye?

    A: When infected with pinkeye, EyeSmart recommends waiting two weeks after completing a course of topical antibiotics before using makeup. If the pinkeye is caused by a virus, doctors do not prescribe eye drops, but two weeks is also the suggested waiting period before resuming the use of makeup.
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  • What are some steps how to improve your eyesight?

    Q: What are some steps how to improve your eyesight?

    A: According to Dr. Mao Shing Ni for The Dr. Oz Show website, some of the ways an individual can improve his eyesight are to eat the right foods, exercise the eyes and make sure the eyes get plenty of rest. Some doctors recommend massages as a way to increase the flow of blood to the eyes and acupuncture to strengthen vision, notes WebMD.
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  • How long do eye floaters last?

    Q: How long do eye floaters last?

    A: WebMD states that eye floaters generally do not go away once they form, but do become less noticeable over time. If the floater is seriously affecting someone's vision, he or she should consult an optometrist.
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  • What are prism eyeglasses?

    Q: What are prism eyeglasses?

    A: Prism eyeglasses are prescription glasses that have a prism in the lens. The prism can be ground into the lens, or it can be a sticker stuck to the lens. The primary use of prisms in eyeglasses is for positional correction, convergence correction and double vision correction.
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  • What alternative can be used in place of contact lens solution?

    Q: What alternative can be used in place of contact lens solution?

    A: There is no safe alternative to commercial contact lens solution. Saline solutions, distilled water or do-it-yourself salt solutions do not disinfect contact lenses and can lead to irritation, infection or permanent damage.
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  • How do polarized sunglasses work?

    Q: How do polarized sunglasses work?

    A: Polarized sunglasses are coated with a vertical film that filters out the horizontal light waves reflected off of smooth flat surfaces, such as roads and water. These reflected waves are commonly called glare.
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  • Why do I need a prism in my eyeglasses?

    Q: Why do I need a prism in my eyeglasses?

    A: Prisms are utilized in eyeglasses to correct positional issues and double vision, according to Glasses Crafter. Prism eyeglasses are also beneficial to individuals who suffer from hemianopia, a condition that causes partial blindness in both eyes. Prism glasses train the eyes to work together, allowing for proper positioning and focusing.
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  • Why do my eyes burn when I put my contacts in?

    Q: Why do my eyes burn when I put my contacts in?

    A: Eye allergies, sensitivity to ingredients in the contact lens solution, dirty lenses and dry eyes can make the eyes burn when contacts are inserted, according to All About Vision. Bausch & Lomb advises individuals who experience burning sensations when inserting contact lenses to remove them immediately.
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  • How do you fix broken reading glasses?

    Q: How do you fix broken reading glasses?

    A: To fix broken reading glasses, purchase an eyeglass repair kit, replace any lost screws, apply clear nail polish to secure the screws, and wrap a rubber band around the arms to tighten a loose hinge. If the plastic frames have broken, wrap tape around the break.
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  • What is the best way to clean plastic eyeglass lenses?

    Q: What is the best way to clean plastic eyeglass lenses?

    A: Heidi Mitchell explains in the Health & Wellness section of The Wall Street Journal that the best way to clean plastic eyeglass lenses is to run them under warm water and create a lather on the lens by putting a small drop of dishwashing detergent on the tip of the fingers. After lathering the lens carefully, they must be rinsed with warm water and then dried with a clean, soft cotton cloth.
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  • How do you put contacts in small eyes?

    Q: How do you put contacts in small eyes?

    A: If it seems as if your eyes are getting smaller, you may be squinting because your eyes are too dry. Use a moisturizing solution with your contacts. When inserting contacts, do it without stretching the eyelids for the most comfortable experience.
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  • Do manufacturers make red-colored contacts?

    Q: Do manufacturers make red-colored contacts?

    A: There are manufacturers who make decorative red contact lenses that can be worn with costumes; however, the lenses sold must be FDA approved. It is illegal for contact lens manufacturers to sell colored lenses to consumers that are non-prescription and unregulated.
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  • How do night vision glasses work?

    Q: How do night vision glasses work?

    A: Night-vision glasses work by capturing tiny amounts of light, some of it from the infrared portion of the light spectrum, and amplifying it in order to create an image that is more easily observed. Some systems may also utilize thermal imaging technology, either alone or in concert with light amplification.
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