Argon Laser

The blue/green wavelengths can pass through the fluid inside of the eye without damaging the eye, making it a benefit to treating diabetic retinopathy. Diabetic retinopathy is a severe disorder of the retina where the blood vessels leak. The argon gas laser works by burning and sealing the blood vessels. Dermatologists use argon gas lasers to treat ulcers, lesions and polyps as well. The argon laser targets a precise area and offers a great advantage over other therapies.

As stated above, some of the eye problems that can be treated with argon gas laser include retinal detachment, glaucoma and macular degeneration. The lasers give out continuous waves of milliwatts to tens of watts. It passes through tubes made of Nickel end bells, Kevlar metal to ceramic seals, beryllium oxide ceramics or tungsten disks.

The different wavelengths work together either simultaneously or individually. It has nine different wavelengths, and two of them are the most powerful and most commonly used. The most powerful wavelengths are in the blue and blue and green regions. The argon gas laser operates in continuous wave mode and can work in very rapid, short duration pulses.

Yag Laser

Posterior capsule opacification, or PCO, is common after cataract surgery, especially after a few years have passed. Even a perfect surgery by a master surgeon still leads to PCO in many cases. Fortunately, we have the ability to use the YAG laser to perform a posterior capsulotomy, which is safe and highly effective and takes just a few minutes. Because of the high prevalence of PCO, every cataract surgeon needs to know how to perform an effective YAG laser capsulotomy.

The two primary techniques are the cruciate pattern and the circular pattern, and each has its benefits and downsides. Both techniques work well and can produce excellent results, and while some surgeons prefer one technique over the other, many surgeons, like me, make use of both techniques and tailor the procedure to the patient.

Diode Laser

The diode laser is a semiconductor laser which therefore defines a particular type of laser. However, at the beginning there was doubt whether you can do something productive with this laser or with any other laser for that matter. Even the US American physicist Theodore Maiman, who had constructed the first functioning laser in 1960 (a ruby laser, i.e. a solid-state laser), did not at first expect much from his invention, and merely considered it “a solution that is searching for its problem”. The laser diode was not valued any better. It was not until the laser technology was initially used industrially in 1969, namely for welding watch springs, did a rethink take place. Indeed, in the following decades laser diodes would go on to conquer important application fields in stage technology and consumer electronics.

B scan

Basic Science, Inherited Retinal Disease, and Tumors
Ronald L. Green, Sandra Fraser Byrne, in Retina (Fourth Edition), 2006

B-scan
B-scan differs from A-scan in that it produces a two-dimensional acoustic section (such as a photograph) by using both the vertical and horizontal dimensions of the screen to indicate configuration and location. A section of tissue is examined by an oscillating transducer that emits a sound beam that “slices” through a tissue, much like a slice with a knife. Ophthalmic B-scan instruments require a focused beam that functions at a frequency in the range of 10 MHz. An echo is represented as a dot on the screen rather than as a spike. The strength of the echo is depicted by the brightness of the dot. The coalescence of multiple dots on the screen forms a two-dimensional representation of the examined tissue section