Slit lamp examination is used to examine the parts of the eye, for eye testing. This examination uses a slit lamp, which enables the ophthalmologist can observe the front parts of the eye and the deeper structures of the eye.
What is a Slit Lamp?
A slit lamp is a low-power microscope coupled with a high-intensity light. The high-intensity light is focused in the form of a thin beam of light onto the eye. Using the slit lamp, the ophthalmologist can observe the cornea, lens, iris and deeper structures such as such as iris and retina.
Why is Slit Lamp Examination Done?
- For a routine check up of the eye
- For vision testing
- To check for eye disorders such as cataracts or conjunctivitis
- To check for foreign body
- To check for eye injuries
- For viewing the deeper structures of the eye
How is Slit Examination Done?
- The patient would be asked to sit with the slit lamp placed in front of him/her.
- Dilating drops can be used to observe the deeper structures of the eye
- The chin is to be rested on a support. A narrow beam of light is focused on the eye, and using the microscope, the ophthalmologist can observe the eyes.
- If there is a sign of eye injury or infection, your doctor can take up fluorescein test. This test involves applying a yellow color dye using a paper strip, which is touched inside the lower eyelid. The dye collects in the abnormal areas, making it easy for the doctor to check for injury or infection
A slit examination takes about 5 to 10 minutes. The ophthalmologist may use anesthetic drops in order to remove a foreign object from the eye. The slit examination is simple and does not need any prior preparation.
