cylindrical lens n.
A lens in which one of the surfaces is curved in one meridian and less curved in the opposite meridian. Also called astigmatic lens.
It is corrected by a cylindrical lens that compensates for this defect of the eye.
Between the prism and the cylindrical lens may be seen the colours, tracking themselves through the dust of the room.
A cylindrical lens is placed close to the enlarging lens, with its axis parallel to the length of the spectrum.
Astigmatism is corrected by a cylindrical lens, which is in fact a segment of a solid cylinder of glass.
