20/40 in the better eye, with or without corrective lenses.

20/70 in the better eye requires 140 degree visual field for restricted license.

A license can be issued upon the favorable recommendation of and optometrist or ophthalmologist.

Visual Field: 

Minimum of 130 degrees in the horizontal meridian.  (Between 110 & 130 degrees, with ok Visual Acuity may be approved.)

Bioptic telescopes are not mentioned in the regulations.

Regulation No. 72-2, June 24, 1975.  33 DCP 6708.