This chapter presents an at-a-glance profile of the human eye, detailing its dimensions, structural weights, optical parameters, and functional performance. Key metrics include the eye’s average circumference, volume, and weight, along with visual acuity, visual field extents, and intraocular pressure. Detailed specifications cover the cornea, sclera, iris, lens, aqueous and vitreous humors, retina, choroid, optic nerve, and accessory structures. Highlights include corneal refractive power, axial length, and macular dimensions. New structural insights such as the Accessory Inner Segment (aIS) are included. Tear dynamics, blink rates, contrast sensitivity, and saccadic velocities are also documented, offering a view of ocular architecture and function from a numeric standpoint.