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Far-sightedness, also known as long-sightedness, hypermetropia, and hyperopia, is a condition of the eye where distant objects are seen clearly but near objects appear blurred. This blur is due to incoming light being focused behind, instead of on, the retina due to insufficient accommodation by the lens. Minor hypermetropia in young patients is usually corrected by their accommodation, without any defects in vision. But, due to this accommodative effort for distant vision, people may complain of eye strain during prolonged reading. If the hypermetropia is high, there will be defective vision for both distance and near. People may also experience accommodative dysfunction, binocular dysfunction, amblyopia, and strabismus. Newborns are almost invariably hypermetropic, but it gradually decreases as the newborn gets older.
LASIK or Lasik, commonly referred to as laser eye surgery or laser vision correction, is a type of refractive surgery for the correction of myopia, hyperopia, and an actual cure for astigmatism, since it is in the cornea. LASIK surgery is performed by an ophthalmologist who uses a laser or microkeratome to reshape the eye's cornea in order to improve visual acuity.
Refractive surgery is optional eye surgery used to improve the refractive state of the eye and decrease or eliminate dependency on glasses or contact lenses. This can include various methods of surgical remodeling of the cornea (keratomileusis), lens implantation or lens replacement. The most common methods today use excimer lasers to reshape the curvature of the cornea. Refractive eye surgeries are used to treat common vision disorders such as myopia, hyperopia, presbyopia and astigmatism.
ReLExSmall incision lenticule extraction (SMILE), second generation of ReLEx Femtosecond lenticule extraction (FLEx), is a form of laser based refractive eye surgery developed by Carl Zeiss Meditec used to correct myopia, and cure astigmatism. Although similar to LASIK laser surgery, the intrastromal procedure uses a single femtosecond laser referenced to the corneal surface to cleave a thin lenticule from the corneal stroma for manual extraction.
Mark Cohen is a Canadian laser eye surgeon who practices in Montreal and Toronto. In 2001, he and Avi Wallerstein founded LASIK MD, Canada's largest provider of laser refractive surgery. As of 2013, LASIK MD performs over sixty percent of all laser vision correction procedures in Canada. He is one of only 14 certified C-LASIK instructors in North America.
Avi Wallerstein is a Canadian ophthalmologist and laser eye surgeon who specializes in surgical vision correction, also termed refractive eye surgery. He practises in Montreal and Toronto. In 2001, he co-founded LASIK MD with Mark Cohen. LASIK MD is Canada's largest provider of laser refractive surgery, performing over 60,000 procedures a year. He is one of only 14 certified CLasik instructors in North America.
Besifloxacin (INN/USAN) is a fourth-generation fluoroquinolone antibiotic. The marketed compound is besifloxacin hydrochloride. It was developed by SSP Co. Ltd., Japan, and designated SS734. SSP licensed U.S. and European rights to SS734 for ophthalmic use to InSite Vision Incorporated in 2000. InSite Vision developed an eye drop formulation (ISV-403) and conducted preliminary clinical trials before selling the product and all rights to Bausch & Lomb in 2003.
Stephen Updegraff, M.D., FACS is an American refractive surgeon best known for his early involvement in, and contributions to, LASIK. He is a Fellow of the American College of Surgeons, a board-certified member of the American Board of Ophthalmology, a founding member of the American College of Ophthalmic Surgeons, and a member of the International Society of Refractive Surgery, the American Academy of Ophthalmology, the American Society of Cataract and Refractive Surgery, and the Pine Ridge Eye Study Society. Updegraff currently serves as the medical director of Updegraff Vision in St. Petersburg, Florida.
Gholam A. Peyman is an Iranian American ophthalmologist, retina surgeon, and inventor. He is best known for his invention of LASIK eye surgery, a vision correction procedure designed to allow people to see clearly without glasses. He was awarded the first US patent for the procedure in 1989.
Jeff Machat MD, FRCSC, DABO is an ophthalmologist in the United States and Canada specializing in surgical vision correction better known as refractive eye surgery.
Peter S. Hersh is an American ophthalmologist, researcher, and specialist in LASIK eye surgery, keratoconus, and diseases of the cornea. He co-authored the article in the journal Ophthalmology that presented the results of the study that led to the first approval by the U.S. Food and Drug Administration (FDA) of the excimer laser for the correction of nearsightedness in the United States. Hersh was also medical monitor of the study that led to approval of corneal collagen crosslinking for the treatment of keratoconus. He was the originator, in 2015, of CTAK for keratoconus, patent holder, and co-developer.
The eye, like any other optical system, suffers from a number of specific optical aberrations. The optical quality of the eye is limited by optical aberrations, diffraction and scatter. Correction of spherocylindrical refractive errors has been possible for nearly two centuries following Airy's development of methods to measure and correct ocular astigmatism. It has only recently become possible to measure the aberrations of the eye and with the advent of refractive surgery it might be possible to correct certain types of irregular astigmatism.
Sheraz Daya is a British ophthalmologist. Daya founded the Centre for Sight in 1996, and works in stem-cell research and sight restoration and correction surgery.
Bruce Mitchel Zagelbaum is an American ophthalmologist specializing in cornea and external disease, laser vision correction, eye trauma, and sports ophthalmology. He authored the textbook Sports Ophthalmology, and was the principal investigator in eye injury studies involving players in Major League Baseball and in the National Basketball Association. He is an associate clinical professor of ophthalmology at Hofstra North Shore - LIJ School of Medicine and North Shore University Hospital where he is an attending physician.
Theo Seiler is a German ophthalmologist and physicist. He is considered one of the pioneers of refractive surgery.
Post-LASIK ectasia is a condition similar to keratoconus where the cornea starts to bulge forwards at a variable time after LASIK, PRK, or SMILE corneal laser eye surgery. However, the physiological processes of post-LASIK ectasia seem to be different from keratoconus. The visible changes in the basal epithelial cell and anterior and posterior keratocytes linked with keratoconus were not observed in post-LASIK ectasia.
Allon Barsam is a London-based ophthalmologist specializing in cataract surgery, refractive surgery and corneal and external eye disease. Barsam carried out the first human treatments of microwave keratoplasty.
Dimitri Azar is an American ophthalmologist, professor, and businessman who leads Twenty Twenty Therapeutics, a joint venture established by Santen and Verily. Azar has held roles at Novartis and Verily, Alphabet's Life sciences research organization. He served as dean of the College of Medicine at the University of Illinois at Chicago (UIC) from 2011 to 2018.
Anastasios John Kanellopoulos is a Greek-American eye surgeon specializing in corneal transplantation, cornea crosslinking for keratoconus, complicated cataract surgery and complicated glaucoma. Widely known for research and clinical contributions in micro-incision cataract, customized laser refractive surgery and corneal cross-linking propagation and most innovations, reducing corneal transplants for advanced keratoconus.
References
- 1 2 3 4 Landau, Elizabeth (2013-05-17). "Her vision: Better, clearer sight". CNN.com. Retrieved 2017-03-18.
- 1 2 3 "Marguerite McDonald, M.D., receives inaugural Visionary Woman Award | Ophthalmology Magazine". Eyeworld.org. Retrieved 2017-03-18.
- ↑ "Newsroom". News.essilorusa.com. Retrieved 2017-03-18.
- ↑ "ASCRS member survey shows U.S. LASIK volume continues its growth". www.healio.com.
- ↑ "World-renowned ophthalmologist, Dr. Marguerite McDonald, on managing dry eye patients with TearLab | BioTuesdays". Archived from the original on 2014-03-07. Retrieved 2013-05-29.