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A positive test is defined by excessive upward excursion followed by downward drift of the upper eyelid immediately after the eye opens, in similar fashion to Cogan's lid twitch sign. The test is negative if the upper eyelid position remains stable when the eye opens. A positive test is consistent with a diagnosis of OMG.
In medical diagnosis, test sensitivity is the ability of a test to correctly identify those with the disease (true positive rate), whereas test specificity is the ability of the test to correctly identify those without the disease (true negative rate). If 100 patients known to have a disease were tested, and 43 test positive, then the test has ...
Here "T+" or "T−" denote that the result of the test is positive or negative, respectively. Likewise, "D+" or "D−" denote that the disease is present or absent, respectively. So "true positives" are those that test positive (T+) and have the disease (D+), and "false positives" are those that test positive (T+) but do not have the disease (D ...
A negative value indicates field loss, while a positive value indicates that the field is above average. A P value is provided if the global indices are abnormal. It provides a statistical representation of the population. For example, P <2% means that less than 2% of the population have vision loss worse than measured [19]
Negative relative accommodation (NRA) was proposed by Joseph Kearney of Oxford University in 1967 as a measure of the maximum ability to relax accommodation while maintaining clear, single binocular vision. It is an indirect measurement of fusional vergence in binocular vision. [1]
When a positive rapid antigen test goes from a dark line to a very faint line, this means that the virus load in the swab is probably less than when then line was dark, he adds.
Myogenic ptosis, which includes oculopharyngeal muscular dystrophy, myasthenia gravis, myotonic dystrophy, ocular myopathy, simple congenital ptosis and blepharophimosis syndrome. Aponeurotic ptosis, which may be involutional or postoperative. Mechanical ptosis, which is the result of edema or tumors of the upper lid.
Class Type Description 0: No TB exposure Not infected: No history of exposure Negative reaction to tuberculin skin test 1: TB exposure No evidence of infection: History of exposure Negative reaction to tuberculin skin test 2: TB infection No disease: Positive reaction to tuberculin skin test Negative bacteriologic studies (if done)