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ANSI Standards

QuestionAnswer
A prescription must be placed in ________ cylinder form in order to check tolerances. minus
sphere power meridian (svl or multifocal) 0.00 to 6.50 D is ____ +/- 0.13
sphere power meridian (svl or multifocal) > 6.50 D is_____ +/- 2%
cylinder power meridian (svl or multifocal) 0.00 to 8.00 D is _____ +/- 0.13
cylinder power meridian (svl or multifocal) >2.00 to 4.50 D is _____ +/- 0.15
cylinder power meridian (svl or multifocal) > 4.50 is _____ +/- 4%
sphere power meridian (pal) 0.00 to 8.00 D is _____ +/- 0.16
sphere power meridian (pal) >8.00D is _____ +/- 2%
cylinder power meridian (pal) 0.00 to 2.00 D is ____ +/- 0.16
cylinder power meridian (pal) >2.00 to 3.50 D is _____ +/- 0.18
cylinder power meridian (pal) >3.50 D is +/- 5%
ADD power 0.00 to 4.00 D is _______ +/- 0.12
ADD power >4.00 D is _____ +/- 0.18
Axis tolerance 0.00 to 0.25 D is _____ +/- 14 degrees
Axis tolerance >0.25 to 0.50 D is ______ +/- 7 degrees
Axis tolerance >0.50 to 0.75 D is ______ +/- 5 degrees
Axis tolerance >0.75 to 1.50 D is _____ +/- 3 degrees
Axis tolerance >1.50 D is ________ +/- 2 degrees
Prism (svl and multifocal) vertical 0.00 to 3.37 D is +/- 0.33
Prism (svl and multifocal) vertical >3.37 D is ____ 1 mm difference in height of MRP (1 mm from where it's supposed to be)
Prism(svl and multi) horizontal 0.00 to 2.75 D is _____ +/- 0.67
Prism (svl and multi) horizontal >2.75 D is ____ 2.5 mm from specified PD (total PD gets 2.5 mm tolerance)
veritical prism (PAL) 0.00 to 3.375 D is ____ +/- 0.33
vertical prism (PAL) >3.375 D is _______ 1 mm difference in height of MRP (1mm difference between the 2 lenses)
horizontal prism (PAL) 0.00 to 3.375 D is ______ +/- 0.67
horizontal prism (PAL) >3.375 D is _____ 1 mm from specified monocular PD (each eye gets 1 mm tolerance)
Prism (Uncut Lenses) 0.33 or 1 mm from specified location
segment or fitting cross location veritical location +/- mm from specified location
segment or fitting cross location vertical difference +/- 1 mm from each other
segment or fitting cross location horizontal location +/- 2.5 mm from specified near PD (segments), and +/- 1 mm from monocular pd (pal)
segment or progressive tilt +/- 2 degrees
BC (when specified) +/- 0.75
Center thickness (when specified) +/- 0.3
segment size +/- 0.5 mm
warpage +/- 1.00 (of cylinder induced on front)
impact resistance capable of withstanding the impact of a 5/8 inch steel ball dropped from 50 inches)
Created by: celticdragon86
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