Contact biometry is also known as:

Contact biometry is synonymous with applanation biometry because it involves direct contact with the ocular surface, usually utilizing a method where the cornea is flattened or "applanated" to measure its curvature and determine axial length. This technique often employs ultrasound and includes elements where the probe physically touches the eye, allowing for accurate measurements necessary for tasks like calculating intraocular lens power for cataract surgery.

In contrast, immersion biometry entails the use of a fluid-filled space around the eye to obtain measurements without contact with the cornea, while non-contact biometry employs devices that measure parameters without any physical contact. Refraction biometry focuses specifically on measuring refractive error and does not pertain directly to biometry in the context of anterior segment measurements.