What is the pupil?
To complete an eye exam you must understand the processes occurring. The eye is a highly complex and delicate organ. The pupil is the black centre of the eye that dilates in response to the amount of light exposed to it. It is one of the key elements of the eye that’s responsible for vision. A change in pressure in the brain and light conditions has a direct impact on the eye.
A diagnostic pen light also has a pupil size guide for reference when performing an examination. The eye is a highly vascular organ, and easily susceptible to damage. Occasional damage to the blood vessels or surface of the eye is not uncommon however, if you are concerned or experiencing vision changes please seek advice from a medical professional or ophthalmologist.
What is an eye examination?
An eye exam is conducted using an otoscope and pen torch. This test assesses the reflexes of the eye and inspects for any evident damage. As the brain and eyes occupy similar space within the skull, when one swells it can impact the other. For example, if there is an increase in pressure around the brain this can be visible in the pupil as it will be larger or not react fully to light. Any significant changes to the eye after an acute trauma should be reviewed by a medical professional.
How to
- The pupil gauge on the side of the examination pen light refers to the size of the pupils after reacting to the examination light.
- Hold the torch 10 cm from the eye
- Start with the light away from the eye and then slowly move it directly in front of the face
- Observe any changes in the pupil and eye.
- Note your findings and repeat with the other eye.