Burma Road Riot
Question 1 - Definitions
Visual Acuity
Visual acuity is a test used to determine the smallest letters a person can read on a standardized chart (Snellen chart) or a card held 14 – 20 feet away. This test may be done in a health care provider's office, a school, a workplace, or elsewhere.
Visual acuity is expressed as a fraction.
• The top number refers to the distance you stand from the chart. This is usually 20 feet.
• The bottom number indicates the distance at which a person with normal eyesight could read the same line you correctly read.
For example, 20/20 is considered normal. 20/40 indicates that the line you correctly read at 20 feet away can be read by a person with normal vision from 40 feet away.
Even if you miss one or two letters on the smallest line you can read, you are still considered to have vision equal to that line.
Abnormal results may be a sign that you need glasses or contacts, or it may mean that you have an eye condition that needs further evaluation by a health care provider.
Symptoms and Signs
Symptoms
A symptom is subjective indication of a disease or a change in condition as perceived by the patient. For example, the halo symptom of glaucoma is seen by the patient as colored rings around a single light source. Many symptoms are accompanied by objective signs, such as pruritus, which is often reported with erythema and a maculopapular eruption on the skin. Some symptoms may be objectively confirmed, such as numbness of a body part, which may be confirmed by absence of response to a pin prick. Primary symptoms are symptoms that are intrinsically associated with a disease. Secondary symptoms are a consequence of illness and disease.
Sign
A sign is an indication of the existence of something; any objective evidence of a disease, i.e., such evidence as is perceptible to the examining physician, as opposed to the subjective sensations (symptoms) of the patient. It is an objective finding, usually detected on
Visual Acuity
Visual acuity is a test used to determine the smallest letters a person can read on a standardized chart (Snellen chart) or a card held 14 – 20 feet away. This test may be done in a health care provider's office, a school, a workplace, or elsewhere.
Visual acuity is expressed as a fraction.
• The top number refers to the distance you stand from the chart. This is usually 20 feet.
• The bottom number indicates the distance at which a person with normal eyesight could read the same line you correctly read.
For example, 20/20 is considered normal. 20/40 indicates that the line you correctly read at 20 feet away can be read by a person with normal vision from 40 feet away.
Even if you miss one or two letters on the smallest line you can read, you are still considered to have vision equal to that line.
Abnormal results may be a sign that you need glasses or contacts, or it may mean that you have an eye condition that needs further evaluation by a health care provider.
Symptoms and Signs
Symptoms
A symptom is subjective indication of a disease or a change in condition as perceived by the patient. For example, the halo symptom of glaucoma is seen by the patient as colored rings around a single light source. Many symptoms are accompanied by objective signs, such as pruritus, which is often reported with erythema and a maculopapular eruption on the skin. Some symptoms may be objectively confirmed, such as numbness of a body part, which may be confirmed by absence of response to a pin prick. Primary symptoms are symptoms that are intrinsically associated with a disease. Secondary symptoms are a consequence of illness and disease.
Sign
A sign is an indication of the existence of something; any objective evidence of a disease, i.e., such evidence as is perceptible to the examining physician, as opposed to the subjective sensations (symptoms) of the patient. It is an objective finding, usually detected on