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The third eye (also called the mind's eye or inner eye) is an invisible eye, usually depicted as located on the forehead, supposed to provide perception beyond ordinary sight. [1] In Hinduism , the third eye refers to the ajna (or brow) chakra .
Ajna (Sanskrit: आज्ञा, IAST: Ājñā, IPA: [ˈaːd͡ʑɲaː]), brow [1] or third eye chakra, is the sixth primary chakra in the body according to Hindu tradition and signifies the unconscious mind, the direct link to Brahman (ultimate reality). [2]
In 1886, he described an eye-like structure, which he called the pineal eye or parietal eye, that was associated with the parietal foramen and the pineal stalk. [77] The presence of a pineal body was already discovered by German zoologist Franz Leydig in 1872, in European lizards. Leydig called them the "frontal organ" (German stirnorgan).
The oculomotor nerve, also known as the third cranial nerve, cranial nerve III, or simply CN III, is a cranial nerve that enters the orbit through the superior orbital fissure and innervates extraocular muscles that enable most movements of the eye and that raise the eyelid.
The vestibulo-ocular reflex (VOR) is a reflex that acts to stabilize gaze during head movement, with eye movement due to activation of the vestibular system, it is also known as the cervico-ocular reflex. The reflex acts to stabilize images on the retinas of the eye during head movement. Gaze is held steadily on a location by producing eye ...
Oculomotor nerve palsy or oculomotor neuropathy [1] is an eye condition resulting from damage to the third cranial nerve or a branch thereof. As the name suggests, the oculomotor nerve supplies the majority of the muscles controlling eye movements (four of the six extraocular muscles, excluding only the lateral rectus and superior oblique).
Spectral sensitivity is the relative efficiency of detection, of light or other signal, as a function of the frequency or wavelength of the signal. In visual neuroscience , spectral sensitivity is used to describe the different characteristics of the photopigments in the rod cells and cone cells in the retina of the eye .
Light from a single point of a distant object and light from a single point of a near object being brought to a focus. The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.