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2. Duochrome test - Wikipedia

   en.wikipedia.org/wiki/Duochrome_test

   A duochrome test is a test commonly used to refine the final sphere in refraction (undercorrection and overcorrection), which makes use of the longitudinal chromatic aberration of the eye. Because of the chromatic aberration of the eye, the shorter wavelengths (green) are focused in front of the longer red wavelengths.

3. Romberg's test - Wikipedia

   en.wikipedia.org/wiki/Romberg's_test

   Romberg's test, Romberg's sign, or the Romberg maneuver is a test used in an exam of neurological function for balance. The exam is based on the premise that a person requires at least two of the three following senses to maintain balance while standing:

4. Prism fusion range - Wikipedia

   en.wikipedia.org/wiki/Prism_fusion_range

   The prism fusion range (PFR) or fusional vergence amplitude is a clinical eye test performed by orthoptists, optometrists, and ophthalmologists to assess motor fusion, specifically the extent to which a patient can maintain binocular single vision in the presence of increasing vergence demands.

5. Jackson cross cylinder - Wikipedia

   en.wikipedia.org/wiki/Jackson_cross_cylinder

   Jackson cross cylinder of +/- 0.25 diopter. Jackson cross cylinder is a single low power lens, which is a combination of a plus cylinder and a minus cylinder of equal power with axis perpendicular to each other, with a handle placed between the two axes at 45 degrees.

6. Slit lamp - Wikipedia

   en.wikipedia.org/wiki/Slit_lamp

   Eye examination with the aid of a slit lamp. Side view of a slit lamp machine. Cataract in human eye: magnified view seen on examination with the slit lamp. In ophthalmology and optometry, a slit lamp is an instrument consisting of a high-intensity light source that can be focused to shine a thin sheet of light into the eye.

7. Gonioscopy - Wikipedia

   en.wikipedia.org/wiki/Gonioscopy

   Gonioscopy indicates the angular width of the iridocorneal angle by the number of ocular structures visible above the rim of the iris. Generally the more structures visible, the wider the angle. However, not all structures may be easily discriminated, especially the faint Schwalbe's line at the top of the stack. Further information is obtained ...