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Approximately 50% of the world’s population requires some form of vision correction. In 1993, it was estimated that 50 million people worldwide choose to wear contact lenses as the primary means of obtaining clear vision.
Ophthalmic laser surgery was a significant development in ophthalmology over the past three decades. Several types of lasers may be used on different parts of the eye and have been helpful in treating many different types of eye diseases, and conditions.
Laser Surgery PDF LASIK Refractive surgery PDF
What is a LASER and how does it work?
The term ‘LASER’ is an abbreviation for ‘Light Amplification by Stimulated Emission of Radiation’.
Various types of ophthalmic lasers are used to treat different types of eye conditions. Ophthalmic lasers are named according to the material contained in their plasma tube source.
In the most commonly used ophthalmic lasers, a powerful electric current is passed through a tube containing one of several gases (Argon, Krypton or Argon Fluoride) or a solid material (neodymium-YAG, Q-Switched). Light Energy is produced and the laser emits a small uniform light beam which, when focused through a microscope or other lenses, produces either heat coagulation, tissue cutting, or ablates / evaporates certain eye tissues – as per the need of the patient.
OLDER Argon gas lasers emit a green or blue-green light beam, and is used to treat Retinal or Iris tissue, while the Krypton gas laser emits a red or yellow light beam to be used for treating other types of Retinal conditions. Both are less frequently used nowadays.
Solid state crystal lasers and diode lasers are commonly available too, and have other specific applications.
NEWER Q-Switched and YAG Lasers are more widely used to treat Retina and Iris Tissue conditions, as well as separating / breaking thin membranes.
Excimer (Excited Dimer) Laser is used during LASIK and PRK / Epi-Lasek / LASEK surgeries for Vision Correction and Enhancement of previous similar surgeries.
Femto-Second Lasers are used to separate layers of clear tissue so as to create Corneal Flaps for LASIK, Pockets for Corneal Inserts and Reshaping (SMILE), and entry wounds for corneal & Cataract surgery and Corneal Grafts, as well as Lens Fragmentation for Cataract Surgery.
What are the advantages of using ophthalmic lasers?
The ophthalmic laser allow patients to be treated without the risk of infection, in a relatively painless way with minimal discomfort, on an outpatient basis. With their sophisticated microscopic focusing and delivery systems, ophthalmic lasers provide the ophthalmologist with precision and control not previously available with other surgical techniques. This precision, safety, convenience, and reduced cost allows more people to be treated successfully for an increasing number of eye disorders and diseases.
Which conditions can be treated with ophthalmic lasers?
1. Disease of the retina.
2. Glaucoma
The laser is used to create a tiny opening – iridotomy – in the peripheral iris of the eye to allow the occular fluids to circulate better and reduce acute pressure rises and the development of optic Nerve damage. Surgical intervention with iridotomy, and Cataract Extraction may assist in control of the intra-ocular pressure, if it proves to be necessary and appropriate. Membranes of the eye.
If you suffer from dry eyes , red eyes or conjunctivitis, make an urgent appointment to consult your eye doctor.
Blurred vision, double vision, glares and halos can make the most enjoyable activities difficult.
Orthokeratology allows the user to be lens free during the day by the use of night time hard lenses
This eye disease causes distorted vision due to a change of shape in the cornea.
Many children are losing their vision due to excessive “screen time”. Ortho-K lenses can radically reduce the progression of myopia.
LASIK is a quick and painless surgical procedure that corrects the shape of the cornea.
