Slit Lamp Biomicroscope
The Slit-Lamp is the main piece of equipment used by optometrists and ophthalmologists to examine the eye. It consists of a binocular microscope and a bright illuminating light. It gives a magnified view of the main structures of the eye from the lids, lashes and cornea at the front of the eye to the optic nerve and retina at the back. It is also essential to examine the fitting of contact lenses on the eye and to check the cornea if the eye has been scratched or injured due to an accident. Magnification of between 10 and 40 times can be achieved.
In applanation tonometry the intraocular pressure is inferred from the force required to flatten (applanate) a constant area of the applanationcornea.Goldmann tonometry is considered to be the gold standard test and is the most widely accepted method. A special disinfected prism is mounted on the tonometer head and then placed against the cornea.Dr Pratik then uses a cobalt blue filter to view two green semi circles. The force applied to the tonometer head is then adjusted using a dial connected to a variable tension spring until the inner edges of the green semicircles in the viewfinder meet. When an area of 3.06mm has been flattened, the opposing forces of corneal rigidity and the tear film are roughly approximate and cancel each other out allowing the pressure in the eye to be determined from the force applied.
State- of- the- art Fundus camera takes pictures of the retina .It helps to document , assess the present condition and the progression of disease with time.A fundus angiogram uses fluorescein dye and the camera to take pictures and evaluate the blood flow through the vessels in the back of the eye. During an eye angiogram, the dye is injected into a vein in your arm. Once injected, it takes about 10 to 15 seconds to circulate through your body. As the dye enters the blood vessels in your eyes, a series of photos are taken to chart the dye's progress. More pictures are taken after most of the dye has passed through your eyes to see if any of it has leaked out of the blood vessels. Any dye that leaks out of the blood vessels will color the tissues and fluid in the eye. Filters in the camera allow the areas colored by the dye to show up in the photos. Unlike other angiogram procedures, an eye angiogram is not an X-ray procedure, so you are not exposed to any radiation.
OCT is a new diagnostic tool that provides images of the back of the eye of unprecedented quality. This information is particularly helpful for diagnosing and monitoring many cases of retinal disease, as well as glaucoma, which previously had mystified even the most experienced clinicians. OCT uses a principle akin to ultrasound. A beam of light is split in two, with one beam 'the reference' bouncing off a mirror a known distance away while the second passes through the pupil and is reflected off the various layers of the retina. OCT is 10 times more sensitive than ultrasound, with the ability to display objects as small as one hundredth of a millimetre wide. Unlike fluorescein angioography, previously the standard test for retinal disease, which required the injection of a contrast dye and a very bright light, OCT is much easier to perform.
B-Scan ( Sonography of the Eye)
What is an Eye Ultrasound?
A non-invasive procedure which uses high-frequency sound waves to form reflections (echoes) of the structure of the eye.
Why is this done?
To help evaluate the farthest part of the eyeball when cataracts or other reasons make it hard to look into the eye To help diagnose retinal detachment or other disorders when the eye is not clear and the ophthalmologist cannot use routine examining equipment
Who will do the test?
Dr Pratik Mahajan
How long will the test take?
15 to 20 minutes
How is the test done?
You may be asked to look in different directions to improve the ultrasound image or to view different reas of the eye A lubricant is placed on the transducer and may run on your cheek, but there will be no other discomfort or pain.
How do I get ready for the test?
No special preparation is necessary for this test.
What is an Eye Ultrasound?
There are no risks.
The surgical set up where currently Dr Pratik is working is equipped with the most advanved vitreoretinal surgical microscope from Topon.This provides crystal clear view, high magnification and attachment for the BIOM. This results in perfect, precise and accurate surgical decision making and better results.
The most advanced vitrectomy systems with Dr Pratik Mahajan come from Alcon( Switzeland0 and the Gueder from Germany. The cutting edge technology with high speed fine gauge cutters and unmatched fluidics provide the best to the patients.
A laser procedure that uses the heat from a laser to seal or destroy abnormal, leaking blood vessels in the retina. The procedure is used to treat diabetic retinopathy, an eye disease caused by high blood glucose that damages the smallest blood vessels supplying the retina, which can lead to blindness. There are two approaches to the use of photocoagulation therapy in treating diabetic retinopathy.
Focal treatment is used to seal specific leaking blood vessels in a small area of the retina, usually near the macula, the light-sensitive layer of tissue at the back of the eye and is in the center of the retina.
Scatter treatment is used to slow the growth of new abnormal blood vessels that have developed over a wide area of the retina.
This is Non-contact visualisation system which provides a wide angle and crisp image. Presently what Dr Pratik uses is Merlin from Volk.