orthoscopic

Having normal vision; free from visual distortion.

Giving an undistorted image. Used of an optical instrument.

Seeing correctly; having normal vision.

Constructed so as to present surrounding objects correctly to the eye: as, an orthoscopic eyepiece or ocular.

Presented in its normal appearance to the eye: as, an orthoscopic image.

Giving an image in correct or normal proportions; giving a flat field of view.

free from optical distortion