Basic Hartmann test setup.
Proposed Hartmann test setup for ophthalmic lenses.
Meridional test ray analysis for spherical lenses.
Analysis about axis.
Reference and test spots on observation screen.
Experimental setup used to test ophthalmic lenses.
Test Hartmanngram for single vision lens.
Power distribution map for single vision lens.
Test Hartmanngram for bifocal lens.
Power distribution map for the bifocal lens.
Test Hartmanngram for progressive.
Power distribution map for progressive lens.
Power error obtained with single vision lens.
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