lddv
1LDDV — Light Duty Diesel Vehicle (Governmental » Transportation) …
2Least distance of distinct vision — The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror. In optometry, the least distance of distinct vision (LDDV) or the reference seeing distance (RSD) is the closest… …
