Ophthalmology is the branch of medicine, which deals with the anatomy, physiology and diseases of the eye. The term ophthalmologist refers to a specialist in medical and surgical eye problems. Since ophthalmologists perform operations on eyes, they are both surgical and medical specialists. The eye is a fragile organ, requiring extreme care before, during, and after a surgical procedure. An expert eye surgeon must identify the need for specific procedure and be responsible for conducting the procedure safely. Anesthesia is essential for any eye surgery. Local anesthesia is most commonly used. Retrobulbar and peribulbar techniques for infiltrating the local area surrounding the eye muscle cone are to immobilize the extraocular muscles and eliminate pain sensation. Topical anesthesia using lidocaine topical gel is preferred for quick procedures. In topical anesthesia, patient cooperation is a must for a smooth procedure. General anesthesia is for children, traumatic eye injuries, major orbitotomies, and for apprehensive patients. Cardiovascular monitoring is preferable in local anesthesia and is mandatory in general anesthesia. Proper sterile precautions are used to prepare the area for surgery, including use of antiseptics like povidone-iodine. Sterile drapes, gowns and gloves are necessary. A plastic sheet with a receptacle helps collect the fluids during phacoemulsification. An eye speculum is used to keep the eyes wide open. Although the terms laser eye surgery and refractive surgery are used as if they were interchangeable, this is not the case. Lasers may be used to treat nonrefractive conditions, while radial keratotomy is an example of refractive surgery without the use of a laser. A cataract is an opacification or cloudiness of the eye's crystalline lens due to aging, disease, or trauma that typically prevents light from forming a clear image on the retina. If visual loss is significant, surgical removal of the lens with lost optical power is performed and it is usually replaced with a plastic intraocular lens. Due to the high prevalence of cataracts, cataract extraction is the most common eye surgery. Rest after surgery is necessary. LASIK is Laser-Assisted In Situ Keratomileusis. LASIK is a type of refractive surgery, performed by ophthalmologists using a laser. The operation is with the patient awake and mobile; however, the patient is sometimes given a mild sedative (such as Valium) and anesthetic eye drops. LASIK is in three steps. The first step is to create a flap of corneal tissue. The second step is remodeling of the cornea underneath the flap with the laser. Finally, the flap is repositioned.

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Health Care Provider

  A health care provider is an individual or an institution that provides preventive, curative, promotional or rehabilitative health care services in a systematic way to individuals, families or communities. An individual health care provider (also known as a health worker) may be a health care professional, an allied health professional, a community health worker, or another person trained and knowledgeable in medicine, nursing or other allied health professions, or public/community health. Institutions (also known as health facilities) include hospitals, clinics, primary care centers and other service delivery points. The practice of health professionals and operation of health care institutions is typically regulated by national or state/provincial authorities through appropriate regulatory bodies for purposes of quality assurance. Together, they form part of an overall health care system. A hospital is an institution for health care typically providing specialized treatment for inpatient (or overnight) stays. Some hospitals primarily admit patients suffering from a specific disease or affection, or are reserved for the diagnosis and treatment of conditions affecting a specific age group. Others have a mandate that expands beyond offering dominantly curative and rehabilitative care services to include promotional, preventive and educational roles as part of a primary health care approach. Today, hospitals are usually funded by the state, health organizations (for profit or non-profit), by health insurances or by charities and by donations. Historically, however, they were often founded and funded by religious orders or charitable individuals and leaders. Hospitals are nowadays staffed by professionally trained doctors, nurses, paramedical clinicians, etc., whereas in history, this work was usually done by the founding religious orders or by volunteers. Health care practitioners includes physicians (including general practitioners and specialists), dentists, physician assistants, nurses (including advanced practice registered nurses), midwives, pharmacists, dietitians, therapists, psychologists, chiropractors, clinical officers, and phlebotomists. Therapist Include: physical therapists, respiratory therapists, occupational therapists, audiologists, speech pathologists, optometrists, emergency medical technicians, paramedics, medical laboratory technicians, medical prosthetic technicians, radiographers, social workers, and a wide variety of other human resources trained to provide some type of health care service. They often work in hospitals, health care centers and other service delivery points, but also in academic training, research and administration. Some provide care and treatment services for patients in private homes. Many countries have a large number of community health workers who work outside of formal health care institutions. Managers of health care services, medical records and health information technicians, and other assistive personnel and support workers are also considered a vital part of health care teams. Medical nursing homes, including residential treatment centers and geriatric care facilities, are health care institutions which have accommodation facilities and which engage in providing short-term or long-term medical treatment of a general or specialized nature not performed by hospitals to inpatients with any of a wide variety of medical conditions. 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