A-scans are achieved by sending a burst of sound waves into the eye, which bounce off of the eye and revert back to the device as an image. The system is equipped with a scanning screen, where the ophthalmologist can read the information and get precise readings on the eye. This is used to detect any abnormalities or diseases.
A B-scan works slightly differently but is just as accurate. This form of ultrasonography uses a brightness scan on the outside of the closed eyelid, rather than with eye drops like in an A-scan. B-scans are beneficial when it is too difficult to use an A-scan on the patient, due to medical issues or other sensitivities. Both of these scanning types can help diagnose retinal detachment, problems with the lens, and abnormalities with all other structures of the eye as well.
About a scans / b scans
A-scans and B-scans are helpful in determining if there are any problems with the patient’s sclera, choroid, cornea, lens, vitreous, retina, eyelid, and more. If the retina is detached, a slew of problems may occur. Using these two types of scans can more easily diagnose this issue before it becomes a bigger one. This is one of the most popular ways that an ophthalmologist can examine the optical nerve or other areas of the eye in an accurate way.