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Glaucoma is a group of eye diseases which result in damage to the optic nerve and cause vision loss. The most common type is open-angle glaucoma, in which the drainage angle for fluid within the eye remains open, with less common types including closed-angle glaucoma and normal-tension glaucoma. Open-angle glaucoma develops slowly over time and there is no pain. Peripheral vision may begin to decrease, followed by central vision, resulting in blindness if not treated. Closed-angle glaucoma can present gradually or suddenly. The sudden presentation may involve severe eye pain, blurred vision, mid-dilated pupil, redness of the eye, and nausea. Vision loss from glaucoma, once it has occurred, is permanent. Eyes affected by glaucoma are referred to as being glaucomatous.
Floaters or eye floaters are sometimes visible deposits within the eye's vitreous humour, which is normally transparent, or between the vitreous and retina. Each floater can be measured by its size, shape, consistency, refractive index, and motility. They are also called muscae volitantes, or mouches volantes. The vitreous usually starts out transparent, but imperfections may gradually develop as one ages. The common type of floater, present in most people's eyes, is due to these degenerative changes of the vitreous. The perception of floaters, which may be annoying or problematic to some people, is known as myodesopsia, or, less commonly, as myodaeopsia, myiodeopsia, or myiodesopsia. It is not often treated, except in severe cases, where vitrectomy (surgery), laser vitreolysis, and medication may be effective.
The sclera, also known as the white of the eye or, in older literature, as the tunica albuginea oculi, is the opaque, fibrous, protective, outer layer of the human eye containing mainly collagen and some crucial elastic fiber. In humans, and many other animals, the whole sclera is white, contrasting with the coloured iris, but in some other mammals the visible part of the sclera matches the colour of the iris, so the white part does not normally show. In the development of the embryo, the sclera is derived from the neural crest. In children, it is thinner and shows some of the underlying pigment, appearing slightly blue. In the elderly, fatty deposits on the sclera can make it appear slightly yellow. People with dark skin can have naturally darkened sclerae, the result of melanin pigmentation.
Vitrectomy is a surgery to remove some or all of the vitreous humor from the eye.
Eye surgery, also known as ocular surgery, is surgery performed on the eye or its adnexa, typically by an ophthalmologist. The eye is a very fragile organ, and requires extreme care before, during, and after a surgical procedure to minimise or prevent further damage. An expert eye surgeon is responsible for selecting the appropriate surgical procedure for the patient, and for taking the necessary safety precautions. Mentions of eye surgery can be found in several ancient texts dating back as early as 1800 BC, with cataract treatment starting in the fifth century BC. Today it continues to be a widely practiced type of surgery, with various techniques having been developed for treating eye problems.
Ophthalmoscopy, also called funduscopy, is a test that allows a health professional to see inside the fundus of the eye and other structures using an ophthalmoscope. It is done as part of an eye examination and may be done as part of a routine physical examination. It is crucial in determining the health of the retina, optic disc, and vitreous humor.
Bruit, also called vascular murmur, is the abnormal sound generated by turbulent flow of blood in an artery due to either an area of partial obstruction or a localized high rate of blood flow through an unobstructed artery.
Aphakia is the absence of the lens of the eye, due to surgical removal, such as in cataract surgery, a perforating wound or ulcer, or congenital anomaly. It causes a loss of accommodation, high degree of farsightedness (hyperopia), and a deep anterior chamber. Complications include detachment of the vitreous or retina, and glaucoma.
A glaucoma valve is a medical shunt used in the treatment of glaucoma to reduce the eye's intraocular pressure (IOP).
Trabeculectomy is a surgical procedure used in the treatment of glaucoma to relieve intraocular pressure by removing part of the eye's trabecular meshwork and adjacent structures. It is the most common glaucoma surgery performed and allows drainage of aqueous humor from within the eye to underneath the conjunctiva where it is absorbed. This outpatient procedure was most commonly performed under monitored anesthesia care using a retrobulbar block or peribulbar block or a combination of topical and subtenon anesthesia. Due to the higher risks associated with bulbar blocks, topical analgesia with mild sedation is becoming more common. Rarely general anesthesia will be used, in patients with an inability to cooperate during surgery.
Iridodialysis, is a localized separation or tearing away of the iris from its attachment to the ciliary body.
Glaucoma is a group of diseases affecting the optic nerve that results in vision loss and is frequently characterized by raised intraocular pressure (IOP). There are many glaucoma surgeries, and variations or combinations of those surgeries, that facilitate the escape of excess aqueous humor from the eye to lower intraocular pressure, and a few that lower IOP by decreasing the production of aqueous.
Buphthalmos is enlargement of the eyeball and is most commonly seen in infants and young children. It is sometimes referred to as buphthalmia. It usually appears in the newborn period or the first 3 months of life. and in most cases indicates the presence of congenital (infantile) glaucoma, which is a disorder in which elevated pressures within the eye lead to structural eye damage and vision loss.
Dr Douglas Moray Cooper Lamb Argyll Robertson FRSE, FRCSEd LLD was a Scottish ophthalmologist and surgeon. He introduced physostigmine into ophthalmic practice and the Argyll Robertson pupil is named after him. He was president of the Royal College of Surgeons of Edinburgh.
Bascom Palmer Eye Institute, of the University of Miami Leonard M. Miller School of Medicine, is a center for ophthalmic care, research, and education. Faculty and staff treat patients from around the world in facilities in Miami-Dade County, Broward County, Palm Beach County, and Collier County. The institute's full-time faculty and researchers encompass many ophthalmic sub-specialties and has been consistently ranked as the #1 eye hospital and vision research center in the country by US News & World Report.
The eye is made up of the sclera, the iris, and the pupil, a black hole located at the center of the eye with the main function of allowing light to pass to the retina. Due to certain muscle spasms in the eye, the pupil can resemble a tadpole, which consists of a circular body, no arms or legs, and a tail.
Vitreomacular adhesion (VMA) is a human medical condition where the vitreous gel of the human eye adheres to the retina in an abnormally strong manner. As the eye ages, it is common for the vitreous to separate from the retina. But if this separation is not complete, i.e. there is still an adhesion, this can create pulling forces on the retina that may result in subsequent loss or distortion of vision. The adhesion in of itself is not dangerous, but the resulting pathological vitreomacular traction (VMT) can cause severe ocular damage.
Glued IOL or Glued Intraocular lens is a new Surgical technique for implantation of a posterior chamber IOL with the use of biological glue in eyes with deficient or absent posterior capsules. A quick-acting surgical fibrin sealant derived from human blood plasma, with both hemostatic and adhesive properties is used.
Micro-invasive glaucoma surgery (MIGS) is the latest advance in surgical treatment for glaucoma, which aims to reduce intraocular pressure by either increasing outflow of aqueous humor or reducing its production. MIGS comprises a group of surgical procedures which share common features. MIGS procedures involve a minimally invasive approach, often with small cuts or micro-incisions through the cornea that causes the least amount of trauma to surrounding scleral and conjunctival tissues. The techniques minimize tissue scarring, allowing for the possibility of traditional glaucoma procedures such as trabeculectomy or glaucoma valve implantation to be performed in the future if needed.
Dr. Sundaram Natarajan, Padmashree Awardee, is an ophthalmologist who has dedicated his life for bringing back the light in the eyes. In 2002, he started a free clinic in Dharavi, which is the largest slum area in Mumbai, and treated more than 8000 people. He has also held free camps in various other suburbs of Mumbai like Mankhurd and Govandi, treating the economically poor. In 2013, he was awarded with Padma Shri, India's fourth highest civilian honour. In 2016, he also held camp in Kashmir region to operate and cure the victims of pellet gun firings. As of January 2019,he heads the Aditya Jyot Eye Hospital, Wadala, Mumbai.
References
- ↑ "Sclerotomy Medical Definition | Merriam-Webster Medical Dictionary". merriam-webster.com. Retrieved 2020-05-23.CS1 maint: discouraged parameter (link)
- ↑ "What is a Sclerotomy?". news-medical.net. 16 October 2018. Retrieved 2020-05-23.CS1 maint: discouraged parameter (link)
- ↑ sclerotomy, the free medical dictionary
- ↑ Brunner, Simon; Binder, Susanne (2013). "Surgery for Proliferative Diabetic Retinopathy". Retina. pp. 1876–1901. doi:10.1016/B978-1-4557-0737-9.00111-9. ISBN 9781455707379 . Retrieved 2020-05-23.CS1 maint: discouraged parameter (link)
- ↑ Takashina, H.; Watanabe, A.; Mitooka, K.; Tsuneoka, H. (2014). "Factors influencing self-sealing of sclerotomy performed under gas tamponade in 23-gauge transconjunctival sutureless vitrectomy". Clinical Ophthalmology. 8: 2085–2089. doi:10.2147/OPTH.S67932. PMC 4199835 . PMID 25336910.
- ↑ "The High-frequency Deep Sclerotomy Glaucoma Procedure". touchOPHTHALMOLOGY. 8 February 2012. Retrieved 2020-05-23.CS1 maint: discouraged parameter (link)