![]() (Exactly how large depends on a lot of other factors, like how dim the room is, and how bright the light is, and any meds the person may be using, so don’t worry about exactly HOW large, just that it is larger than “normal” for that eye.) Watch the pupil as you shine the light into the eye it should start out somewhat larger to begin with than it was in normal room light.It is not necessary that the patient cover the other eye, just that light isn’t allowed to cross the bridge of the nose into the other eye. Using a narrow-beam bright flashlight such as a penlight (NOT a laser pointer!), shine the light into either eye, but not into the other one just yet.The expected response here is that both pupils will dilate (expand) to allow more light into the eye under low light conditions. Look at both pupils in normal room light, to get an idea of two things: How large or small they are under usual conditions, and if they are roughly equal in size when compared.ĭarken the room and wait one or two minutes for the pupils to adapt to the darkness. The Direct Response of the pupil to its own environment should always be the stronger, over the Indirect Response. The Indirect Response is when fellow eye sends messages to the tested eye, telling it to dilate again, because the fellow eye is still in the dark. When a light is shined into the eye, its strongest reaction is from the Direct Response, and is just what you expect: the pupil should get smaller when a light is shined directly into it. There are two main pupillary responses to light, the Direct and Indirect. ![]() In the case of brain injury (concussion, for example) the pupils sometimes give us information about where and how severely the brain might be effected.
0 Comments
Leave a Reply. |