The Snellen chart allows us to test distance vision. The Snellen chart is a tool used by eye doctors to measure a person's ability to see objects at a distance. The chart consists of letters or symbols in varying sizes that are placed at a distance of 20 feet from the patient.
The patient is asked to read the letters from the largest to the smallest until they are no longer able to see them clearly. This test helps to determine a person's visual acuity and is often used as a standard for measuring distance vision.
Their performance is recorded as a fraction (e.g., 20/20 or 6/6), with the numerator representing the distance they were from the chart and the denominator indicating the line they were able to read. This helps determine the sharpness and clarity of their distance vision.
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Where is the external jugular vein located?â
âA) lower back
âB) head
âC) neck
âD) chest
The external jugular vein is located in option C) neck. This vein is an essential part of the circulatory system.
This vein is an essential part of the circulatory system and plays a vital role in returning deoxygenated blood from the head and neck region to the heart. It runs diagonally across the sternocleidomastoid muscle, a prominent neck muscle, and drains into the subclavian vein. The external jugular vein is larger and more superficial than the internal jugular vein, making it more visible and palpable in some individuals. Its primary function is to drain blood from the scalp, face, and parts of the neck, ensuring that oxygen-depleted blood is efficiently returned to the heart for reoxygenation and recirculation.
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