A cataract is a cloudy area in the lens of the eye that leads to a decrease in vision of the eye. Cataracts often develop slowly and can affect one or both eyes. Symptoms may include faded colours, blurry or double vision, halos around light, trouble with bright lights, and difficulty seeing at night. This may result in trouble driving, reading, or recognizing faces. Poor vision caused by cataracts may also result in an increased risk of falling and depression. Cataracts cause 51% of all cases of blindness and 33% of visual impairment worldwide.
Photophobia is a medical symptom of abnormal intolerance to visual perception of light. As a medical symptom, photophobia is not a morbid fear or phobia, but an experience of discomfort or pain to the eyes due to light exposure or by presence of actual physical sensitivity of the eyes, though the term is sometimes additionally applied to abnormal or irrational fear of light, such as heliophobia. The term photophobia comes from the Greek φῶς (phōs), meaning "light", and φόβος (phóbos), meaning "fear".
Cataract surgery, also called lens replacement surgery, is the removal of the natural lens of the eye that has developed a cataract, an opaque or cloudy area. The eye's natural lens is usually replaced with an artificial intraocular lens (IOL) implant.
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness. Untreated, repeated trachoma infections can result in a form of permanent blindness when the eyelids turn inward.
Visual or vision impairment is the partial or total inability of visual perception. In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment – visual impairment may cause the individual difficulties with normal daily tasks including reading and walking. The terms low vision and blindness are often used for levels of impairment which are difficult or impossible to correct and significantly impact daily life. In addition to the various permanent conditions, fleeting temporary vision impairment, amaurosis fugax, may occur, and may indicate serious medical problems.
Patricia Era Bath was an American ophthalmologist and humanitarian. She became the first female member of the Jules Stein Eye Institute, the first woman to lead a post-graduate training program in ophthalmology, and the first woman elected to the honorary staff of the UCLA Medical Center. Bath was the first African-American to serve as a resident in ophthalmology at New York University. She was also the first African-American woman to serve on staff as a surgeon at the UCLA Medical Center. Bath was the first African-American woman doctor to receive a patent for a medical purpose. A holder of five patents, she founded the non-profit American Institute for the Prevention of Blindness in Washington, D.C.
Fight for Sight is a UK charity funding research into the prevention and treatment of blindness and eye disease.
Mildred Mosler Weisenfeld is the Brooklyn-born founder of national not-for-profit foundation the National Council to Combat Blindness in 1946, now known as Fight for Sight, an organization based in New York City that provides initial funds to promising scientists early in their careers. For 50 years, Weisenfeld was a one-woman campaign to increase funding for eye research, despite losing her own vision and having no scientific training.
Fight for Sight is a nonprofit organization in the United States which funds medical research in vision and ophthalmology. It was formed in 1946 as the National Council to Combat Blindness (NCCB), the first non-profit organization in the United States to fund vision research; 2011 marked its 65th anniversary.
Sightsavers is an international non-governmental organisation that works with partners in developing countries to treat and prevent avoidable blindness, and promote equality for people with visual impairments and other disabilities. It is based in Haywards Heath in the United Kingdom, with branches in Sweden, Norway, India, Italy, Republic of Ireland, the United Arab Emirates, and the US.
The Organisation for the Prevention of Blindness is an international non-governmental organisation whose actions today focus exclusively on French-speaking countries in Africa. Their mission is to preserve and restore sight amongst some of the most under-privileged communities in the region. The OPC's principal actions concern blindness prevention, treatment and the elimination of blinding diseases, such as onchocerciasis, trachoma, glaucoma and cataracts as well as formal ophthalmological training.
The Himalayan Cataract Project (HCP) was created in 1995 by Dr. Geoffrey Tabin and Dr. Sanduk Ruit with a goal of establishing a sustainable eye care infrastructure in the Himalaya. HCP empowers local doctors to provide ophthalmic care through skills-transfer and education. From its beginning, HCP responds to a pressing need for eye care in the Himalayan region. With programs in Nepal, Ethiopia, Ghana, Bhutan and India they have been able to restore sight to over 1.4 million people since 1995.
Childhood blindness is an important contribution to the national prevalence of the disability of blindness. Blindness in children can be defined as a visual acuity of <3/60 in the eye with better vision of a child under 16 years of age. This generally means that the child cannot see an object 10 feet away, that another child could see if it was 200 feet away.
Community ophthalmology was described as a new discipline in medicine promoting eye health and blindness prevention through programs utilizing methodologies of public health, community medicine and ophthalmology in 1978. This new discipline was first proposed by Dr. Patricia E. Bath in 1978 after observations of epidemics rates of preventable blindness among under-served populations in urban areas in the US as well as under-served populations in so called third-world countries.
Clare Gilbert is a British ophthalmologist, professor and researcher who focuses on blindness in children. She is based at the London School of Hygiene and Tropical Medicine (LSHTM).
Louise Littig Sloan was an American ophthalmologist and vision scientist. She is credited for being a pioneer of the sub-division of clinical vision research, contributing more than 100 scientific articles in which she either authored or co-authored. Her most notable work was in the area of visual acuity testing where she developed and improved equipment. Sloan received her Ph.D. from Bryn Mawr College in experimental psychology. She spent a short period of time in both Bryn Mawr's experimental psychology program as well as the Department of Ophthalmology at Harvard Medical School. The majority of her career, however, was spent at Johns Hopkins Wilmer Eye Institute where she directed the Wilmer Laboratory of Physiological Optics for 44 years. In 1971, Sloan was the second woman awarded the prestigious Edgar D. Tillyer Award by Optica (formerly Optical Society for her many achievements in the field of vision.
The International Agency for the Prevention of Blindness (IAPB) is a global alliance of eye health organisations working for the prevention of blindness and vision impairment. IAPB was established in 1975 to work as an umbrella body for global blindness prevention activities. This agency is a partner of World Health Organization.
Herbert Edward Kaufman is an American ophthalmologist who discovered idoxuridine, the first clinically useful antiviral agent; co-developed with William Bourne the clinical specular microscope to view the live corneal endothelium, co-developed timolol with Thomas Zimmerman, a new class of medications to treat glaucoma; corneal storage media for eye banks; natamycin, the first commercially available medication to treat fungal infections of the eye; co-developed with Tony Gasset the use of bandage contact lenses; and was involved in the first laser vision photorefractive keratectomy of the eye with Marguarite McDonald.
Van Charles Lansingh is a Mexican ophthalmologist, clinician-scientist and author, specialising in public health. He is currently a faculty at Mexican Institute of Ophthalmology (IMO), Querétaro, Mexico where he serves as Director, International Affairs. He is also a voluntary assistant professor of ophthalmology at the Miller School of Medicine at the University of Miami, and serves as the chief medical officer at HelpMeSee, a global non-profit training organization.
Access to cataract surgery is very variable by country and region. Even in developed countries availability may vary significantly between rural and more densely populated areas.
