{"id":6212,"date":"2020-06-16T19:54:19","date_gmt":"2020-06-16T19:54:19","guid":{"rendered":"https:\/\/www.optometrists.org\/wordpress\/?page_id=6212"},"modified":"2021-07-28T09:55:38","modified_gmt":"2021-07-28T09:55:38","slug":"what-are-contact-lenses","status":"publish","type":"page","link":"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/what-are-contact-lenses\/","title":{"rendered":"What Are Contact Lenses?"},"content":{"rendered":"<h2><b>How do contact lenses correct vision?<\/b><\/h2>\n<p><em>Have you ever thought about how a piece of plastic can improve your vision?<\/em><\/p>\n<p>Contact lenses are primarily prescribed by eye doctors to correct vision acuity affected by <a href=\"https:\/\/www.optometrists.org\/childrens-vision\/what-is-myopia\/\">myopia<\/a>, <a href=\"https:\/\/www.optometrists.org\/childrens-vision\/what-is-long-sightedness\/\">hyperopia<\/a>, <a href=\"https:\/\/www.optometrists.org\/childrens-vision\/what-is-astigmatism\/\">astigmatism<\/a> and <a href=\"https:\/\/www.optometrists.org\/optical\/presbyopia\/\">presbyopia<\/a>. When placed on the cornea, contact lenses enable clear vision by allowing light to properly focus on the retina.<\/p>\n<p>Contact lenses are designed to cover the cornea, the clear covering of the eye. They stay in place by adhering to the tear film of the eye, and through the pressure from the eyelids.\u00a0 When you blink, your eyelid glides over the contact lens, enabling a cleansing and lubricating action to keep the contact lens comfortable on the cornea.<\/p>\n<p><b>Caution<\/b>: Contact lenses must be fitted properly to your eyes. If they slide around due to improper fit, a serious complication called a <a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/common-contact-lens-problems\/contact-lenses-what-can-go-wrong\/\">corneal ulcer<\/a> can occur\u2014 which can lead to permanent vision loss.<\/p>\n<p>If you suspect you have an eye condition,\u00a0<a rel=\"noopener\" href=\"https:\/\/www.optometrists.org\/practice-search\/\" target=\"_blank\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/www.optometrists.org\/practice-search\/&amp;source=gmail&amp;ust=1627552249083000&amp;usg=AFQjCNGJNtagdcKhI49ss08s-MS8-xT62g\"><b>contact an eye doctor<\/b><\/a>\u00a0near you, who can diagnose and treat the condition.<\/p>\n<p><strong>SEE RELATED:<\/strong> <a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/what-are-contact-lenses\/the-contact-lens-exam\/\">The Contact Lens Exam<\/a><\/p>\n\n\t<div class=\"practice-search-widget\">\n\t\t<h3>Find an eye doctor near you<\/h3>\n\t\t\n\t<form class=\"practice-search-form practice-search-form-widget\" action=\"https:\/\/www.optometrists.org\/practice-search\/results\/\" method=\"get\">\n\n\t\t<input type=\"hidden\" name=\"distance\" value=\"100\" class=\"practice-search-distance\">\n\t\t<input type=\"hidden\" name=\"page\" class=\"practice-search-page\">\n\t\t<input type=\"hidden\" name=\"address_latitude\"><input type=\"hidden\" name=\"address_longitude\">\n\n\t\t<input type=\"text\" name=\"address\" class=\"practice-search-address\" placeholder=\"City, Surburb or Address\" value=\"\">\n\n\t\t\n\t\t\t<input type=\"hidden\" name=\"distance\" value=\"100\" class=\"practice-search-distance\">\n\n\t\t\n\n\t\t<button type=\"submit\" class=\"practice-search-button\">\n\t\t\t\t\t\t\t\t\t<svg width=\"19\" height=\"19\" viewBox=\"0 0 19 19\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M10.6796 0.130005C9.15708 0.130059 7.66615 0.5646 6.38198 1.38258C5.09781 2.20057 4.07373 3.36803 3.43004 4.74783C2.78634 6.12763 2.54976 7.66246 2.74808 9.17205C2.9464 10.6816 3.57139 12.1033 4.54964 13.27L0.729639 17.08C0.6364 17.1732 0.562439 17.2839 0.511979 17.4058C0.461519 17.5276 0.435547 17.6581 0.435547 17.79C0.435547 17.9219 0.461519 18.0524 0.511979 18.1743C0.562439 18.2961 0.6364 18.4068 0.729639 18.5C0.917942 18.6883 1.17334 18.7941 1.43964 18.7941C1.5715 18.7941 1.70207 18.7681 1.82389 18.7177C1.94571 18.6672 2.0564 18.5932 2.14964 18.5L5.99964 14.62C7.35406 15.6038 8.98566 16.1324 10.6596 16.13C12.7814 16.13 14.8162 15.2871 16.3165 13.7869C17.8168 12.2866 18.6596 10.2517 18.6596 8.13C18.6596 6.00827 17.8168 3.97344 16.3165 2.47315C14.8162 0.97286 12.7814 0.130005 10.6596 0.130005H10.6796ZM10.6796 14.13C9.49295 14.13 8.33291 13.7781 7.34622 13.1188C6.35952 12.4595 5.59049 11.5225 5.13636 10.4261C4.68224 9.32975 4.56342 8.12335 4.79493 6.95946C5.02644 5.79558 5.59788 4.72648 6.437 3.88736C7.27611 3.04825 8.34521 2.4768 9.5091 2.24529C10.673 2.01378 11.8794 2.1326 12.9757 2.58673C14.0721 3.04085 15.0092 3.80989 15.6685 4.79658C16.3277 5.78328 16.6796 6.94332 16.6796 8.13C16.6796 9.7213 16.0475 11.2474 14.9223 12.3726C13.7971 13.4979 12.2709 14.13 10.6796 14.13Z\" fill=\"#fff\"\/><\/svg>\n\t\t\t\t\t<\/button>\n\n\t\t<button type=\"button\" class=\"practice-search-use-my-location\">\n\t\t\tSearch near me\n\t\t<\/button>\n\n\n\t<\/form>\n\n\n\n\t\t<\/div>\n\n\t\n<h2><b>Types of contact lenses<\/b><\/h2>\n<p>Different types of contact lenses are prescribed to correct a variety of vision conditions:<\/p>\n<ul>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/guide-to-soft-contacts-lenses\/\"><b>Soft contacts<\/b>:<\/a> These lenses are the most commonly prescribed type of contact lens. They are known for their comfort and ease of adaptability. These lenses are available in daily, biweekly, and monthly disposables\u2014 extended wear options are also available.<\/li>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/guide-to-hard-contact-lenses\/\"><b>Rigid gas permeable contacts (RGP)<\/b>:<\/a>\u00a0 These lenses are also known as \u2018hard lenses\u2019. They provide clear vision for many complex vision conditions. Their high oxygen permeability decreases the risk of eye infections. These lenses may take a bit longer to adjust to when compared to soft lenses.<\/li>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/\"><b>Toric lenses<\/b><\/a>: Used for people with astigmatism, these lenses can be prescribed with a standard design for most common optical powers, or specially customized if required.<\/li>\n<li style=\"font-weight: 400;\"><b>Bifocal\/Multifocal contacts<\/b>:\u00a0 Used for correction of focusing difficulties, or to prevent myopia progression, these lenses contain different lens powers for near and distant vision.<\/li>\n<li style=\"font-weight: 400;\"><b>Ortho-k lenses<\/b>: Used for <a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/myopia-management\/\">myopia management<\/a>, these lenses are generally worn overnight, and work to reshape the cornea to enable clear vision during the daytime, without the need for eyewear.<\/li>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/what-are-scleral-lenses\/\"><b>Scleral lenses<\/b>:<\/a> Used for patients with an irregular corneal shape, these lenses bridge over the cornea and rest on the white (sclera) of the eye.<\/li>\n<\/ul>\n<h2><b>What are the advantages and disadvantages of wearing contact lenses?\u00a0<\/b><\/h2>\n<h3><b>Advantages:<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\">Provides clear vision, without eyeglasses<\/li>\n<li style=\"font-weight: 400;\">Increases peripheral vision<\/li>\n<li style=\"font-weight: 400;\">Lowers risk of damaged or lost eyeglasses<\/li>\n<li style=\"font-weight: 400;\">Enhances feeling of \u2018natural vision\u2019<\/li>\n<li style=\"font-weight: 400;\">Elevates self-esteem<\/li>\n<li style=\"font-weight: 400;\">Eliminates foggy or rain spotted lenses<\/li>\n<li style=\"font-weight: 400;\">Facilitates easier wear of protective eyewear<\/li>\n<li style=\"font-weight: 400;\">Improves vision for sports:\n<ul>\n<li style=\"font-weight: 400;\">Reduced risk of eye injuries<\/li>\n<li style=\"font-weight: 400;\">More stable vision<\/li>\n<li style=\"font-weight: 400;\">Better peripheral vision<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3><b>Disadvantages:\u00a0<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\">Cleaning and disinfecting can be inconvenient<\/li>\n<li style=\"font-weight: 400;\">Good eye-hand coordination is necessary for proper insertion\/removal<\/li>\n<li style=\"font-weight: 400;\">Increased risk of eye scratches and infections<\/li>\n<li style=\"font-weight: 400;\">Lenses can fall out, get damaged, or lost during the day<\/li>\n<li style=\"font-weight: 400;\">Blurred vision can result if lens moves too much<\/li>\n<li style=\"font-weight: 400;\">Higher frequency of visits to the eye doctor<\/li>\n<li style=\"font-weight: 400;\">Additional expenses<\/li>\n<\/ul>\n<h2><b>Why do contact lenses cause eye infections?<\/b><\/h2>\n<p><b>Research indicates that most people (ranging from 40-90%) do not take proper precautions to maintain optimal contact lens hygiene.<\/b><\/p>\n<p>Contact lens wearers MUST follow careful instructions to maintain optimal hygiene in order to prevent any eye infections.<\/p>\n<p>Consider these statistics:<\/p>\n<ul>\n<li style=\"font-weight: 400;\">Every year, 1 in 500 contact lens wearers contracts a <a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/common-contact-lens-problems\/contact-lenses-what-can-go-wrong\/\">serious vision threatening eye infection.<\/a><\/li>\n<li style=\"font-weight: 400;\">Improper contact lens use can cause keratitis\u2014 a painful eye infection that affects over 1 million people annually.<\/li>\n<\/ul>\n<h3><b>How to prevent an eye infection from contact lenses<\/b><\/h3>\n<p>While it may seem scary to think that wearing contact lenses can cause serious eye infections, keep in mind that you can <a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/common-contact-lens-problems\/the-dos-and-donts-of-wearing-contact-lenses\/\">minimize your risk of developing an infection<\/a> by taking preventative measures:<\/p>\n<ul>\n<li style=\"font-weight: 400;\">Always wash hands before inserting or removing contact lenses<\/li>\n<li style=\"font-weight: 400;\">Keep fingernails short and clean<\/li>\n<li style=\"font-weight: 400;\">Clean contact lenses and cases as directed by your eye doctor<\/li>\n<li style=\"font-weight: 400;\">Replace contact lenses as directed by your doctor<\/li>\n<li style=\"font-weight: 400;\">Attend all appointments with your eye doctor<\/li>\n<\/ul>\n<h2><b>When are contact lenses NOT recommended?<\/b><\/h2>\n<p>While most people adjust to wearing contacts without much difficulty and truly enjoy their benefits, there are some circumstances that may prevent you from adapting easily. If any of the following factors affect you, eyeglasses may be a more appropriate choice for you.<\/p>\n<ul>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/dry-eye\/allergies\/\">Eye allergies<\/a> with severe eye irritation<\/li>\n<li style=\"font-weight: 400;\">Dusty work or living environment<\/li>\n<li style=\"font-weight: 400;\">Chemical exposure on regular basis<\/li>\n<li style=\"font-weight: 400;\">Overactive thyroid<\/li>\n<li style=\"font-weight: 400;\">Uncontrolled diabetes<\/li>\n<li style=\"font-weight: 400;\">Severe arthritis in your wrist\/hand<\/li>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/dry-eye\/what-is-dry-eye-syndrome\/\">Chronic dry eyes<\/a><\/li>\n<\/ul>\n<p>While these factors may make it difficult to wear contact lenses on a daily basis, speak to your eye doctor about the possibility of wearing contact lenses on occasion, for special events or activities. Your eye doctor will determine the most appropriate type of contact lenses for your individual needs.<\/p>\n<p><strong>LEARN MORE:\u00a0<\/strong>\u00a0<a rel=\"noopener\" href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/\" target=\"_blank\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/&amp;source=gmail&amp;ust=1627552249083000&amp;usg=AFQjCNGFiNChCYiEN8g9bUTMEiO89_DEKA\">Optical and Contact Lenses<\/a><\/p>\n<p><em>There are many benefits to wearing contact lenses. <a href=\"https:\/\/www.optometrists.org\/practice-search\/\">Schedule a comprehensive eye exam<\/a> today to discover if contact lenses can enhance the way you view life around you.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Contact lenses are designed to cover the cornea, the clear covering of the eye. They stay in place by adhering to the tear film of the eye, and through the pressure from the eyelids.\u00a0 When you blink, your eyelid glides over the contact lens, enabling a cleansing and lubricating action to keep the contact lens comfortable on the cornea.<\/p>\n","protected":false},"author":4,"featured_media":3393,"parent":12548,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-article.php","meta":{"footnotes":""},"categories":[],"tags":[132,84,225,156,95,229,230,151,452,246,90,384],"class_list":["post-6212","page","type-page","status-publish","has-post-thumbnail","hentry","tag-acuity","tag-adults","tag-astigmatism","tag-blurry","tag-childrens-vision","tag-contact-lenses","tag-eyeglasses","tag-eyestrain","tag-farsightedness","tag-infection","tag-myopia","tag-presbyopia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Are Contact Lenses? - Optometrists.org<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/optical\/guide-to-contact-lenses\/what-are-contact-lenses\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Are Contact Lenses? - Optometrists.org\" \/>\n<meta property=\"og:description\" content=\"Contact lenses are designed to cover the cornea, the clear covering of the eye. 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