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Basics of USG B-Scan

What is ultrasound Sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy, young adults. B-Scan Ultrasonography: B-scan ultrasonography is an important noninvasive technique for the clinical assessment of various ocular and orbital diseases. Principles […]

with and without glare
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What is Glare?

Glare is defined as the difficulty in vision caused by sources of Direct or Reflected Bright Light that may be Natural or Artificial. Glare occurs when the luminance of the task being done, to which the eye is adapted is lesser than the luminance of the source of Glare. The Bright Light from the Glare […]

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TONOMETRY: The Basis for Diagnosing Glaucoma and Evaluating Therapeutic Response

Intraocular pressure (IOP): The pressure created by the continual renewal of fluids within the eye. The normal range of IOP is 10 to 21 mmofHg. Mechanism of IOP It consists of:a. Formation of aqueous humorb. Drainage of aqueous humor Intraocular Pressure can be measured by: Manometry Tonometry Manometry: Only direct measure of IOP USES Used […]

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Fire Cracker and Blindness

Every Year during the time of  Hindu’s Religious festival of Lights called Deepawali(Diwali), lots of people make their way to the beds of hospitals. Many of them get injured by firecrackers which is a blinding truth about this festival of lights. Most of them are children. From the bright glow of sparklers to the thrill of […]