Syphilis is a sexually transmitted infection (STI) caused by bacteria. Syphilis is spread through direct contact with the sores of an infected person. This usually happens through sexual activity, especially unprotected sex. It can also spread through sharing needles or contact with the blood of an infected person. If you are pregnant, you can give syphilis to your baby.
Simultaneous red reflex test [edit]. The simultaneous red reflex test is used to view both reflexes at the same time. This can help determine if the patient has normal ocular alignment. In order to perform this test the patient and physician are normally approximately 2 to 3 feet away from each other.imultaneous red reflex test [edit]. The simultaneous red reflex test is used to view both reflexes at the same time. This can help determine if the patient has normal ocular alignment. In order to perform this test the patient and physician are normally approximately 2 to 3 feet away from each other.
Introduction. Optical coherence tomography (OCT) has evolved over the past decade as one of the most important ancillary tests in ophthalmic practice. It is a noninvasive imaging technique and provides high-resolution, cross-sectional images of the retina, the retinal nerve fiber layer (RNFL) and the optic nerve head.igure 1. Optical coherence tomography (OCT) images obtained using Cirrus high definition OCT (HD-OCT) system, showing increasing signal quality with the technique of image averaging. (a) A single B-scan showing low signal and increased noise.