6540-00-764-2256 LENS,OPHTHALMIC,SPHERE Index 6540-00-764-2259 LENS,OPHTHALMIC,SPHERE

National Stock Number:
6540-00-764-2257

Federal Supply Class:
6540

National Item Identification Number:
007642257

Description:
LENS,OPHTHALMIC,SPHERE

Detail:
A TRANSPARENT OPTICAL ELEMENT HAVING EQUAL SPHERICAL DIOPTER CURVATURES USED TO CORRECT HYPEROPIC (FARSIGHTEDNESS) OR MYOPIC (NEARSIGHTEDNESS) CONDITIONS OF THE EYE.


Manufacturer Information:
MILL16991A81349MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
LIGHT TRANSMISSIONUNTINTED
MATERIAL AND LOCATIONGLASS OVERALL
CROSS CURVE DIOPTER0.06 PLUS MINIMUM AND 0.18 PLUS MAXIMUM
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY SIZE
DIAMETER52.0 MILLIMETERS MINIMUM AND 56.0 MILLIMETERS MAXIMUM
CROSS-SECTIONAL SHAPE STYLESPHERE
SPECIAL PACKAGINGPR OF IDENTICAL LENSES
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 1 STYLE OR E CLASS OR 52 SIZE
BASE CURVE DIOPTER0.06 PLUS MINIMUM AND 0.18 PLUS MAXIMUM
STYLE DESIGNATORROUND


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