Swinging torch test
[Automated swinging flashlight test in patients with optic nerve diseases].
The swinging-flashlight test is used to help a practitioner identify a relative afferent pupillary defect.
Contents. 1 Process; 2 Interpretation; 3 See also.
The swinging-flashlight test compares the direct light reactions of both eyes ( Levatin et al., ). Preconditions are two pupils with the ability to react equally, i.e.
Description:Steps Use a bright torch which can be focussed to give a narrow, even beam of light. Keep the light source at the same distance from each eye to ensure that the light stimulus is equally bright in both. Correlation between the relative afferent pupillary defect detected manually by grey filter compensating and with the automated procedure proved to be high. Unilateral optic neuropathies are common causes of an RAPD. While glaucoma normally is a bilateral disease, if one optic nerve has particularly severe damage, an RAPD can be seen. Usually, retinal disease has to be quite severe for an RAPD to be clinically evident.
User Comments 3
Post a comment
Comment: