Unassisted vision

Wikipedia Word definitions in Wikipedia
Naked eye , also called bare eye or unaided eye , is the practice of engaging in visual perception unaided by a magnifying or light-collecting optical device, such as a telescope or microscope . Vision corrected to normal acuity using corrective lenses ...

Wiktionary Word definitions in Wiktionary
n. eyesight, unaided by equipment such as a telescope or microscope.

WordNet Word definitions in WordNet
n. the eye unaided by any optical instrument that alters the power of vision or alters the apparent size or distance of objects; "it is not safe to look directly at the sun with the naked eye"

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Naked \Na"ked\ (n[=a]"k[e^]d), a. [AS. nacod; akin to D. naakt, G. nackt, OHG. nacchot, nahhot, Icel. n["o]kvi[eth]r, nakinn, Sw. naken, Dan. n["o]gen, Goth. naqa[thorn]s, Lith. n[*u]gas, Russ. nagii, L. nudus, Skr. nagna. [root]266. Cf. Nude .] Having ...