Sight

Also known as:  Eyesight;  Visual Acuity;  Vision

Sight is the Sense that enables vision to occur.

 The Rods, Cones and Nerve Cells of the Retina of the Eyes are collectively known as Photoreceptors.

 These Photoreceptors translate Light into Nerve Impulses for transmission via the Optic Nerve to the Brain.

 The Optic Nerve enters an area of the Brain known as the Lateral Geniculate Body which partially processes data and passes this data to the Visual Cortex at the rear of the Brain.

Amino Acids

 Taurine may be essential for optimal Sight (due to its role in the maintenance of the health of the Retina). 

Carotenoids

 Lutein may improve Sight.  references

Hormones

 Many people who use exogenous, supplemental Human Growth Hormone (hGH replacement therapy) report improvement in their Eyesight (both near and far, in the daytime as well as night-time). 

 Pregnenolone may improve Eyesight (according to anecdotal reports describing and improvement in the clarity of vision after using supplemental Pregnenolone)  ^[1]