reading glasses(老花鏡) foreuophthalmic optics — specifications forready-to-wear spectacles (bs en 14139)clausetestreal re shall fulfil the general re of en iso14889-frame shall fulfil the re of en iso 12870 (not includingclause 4.2.1 general physiological compatibility)-glazing of spectacles lenses meet lens retention test per en iso12870- thespectacle lenses shall be securely held in position so thatmovement or rotation in the frame cannot occur under any conditionof intended use.4.3optical power range(shall have equal nominal spherical powerwithin range from +1.00 to +3.50 dioptres)4.4optical power tolerances(tolerances to be applied to the valuesdeclared by the manufacturer shall comply with en iso8980-1)4.5reference points and prismatic powertolerances4.5.1design reference points4.5.2prismatic power tolerances5markingindications on packaging andwarningssample required: 8 pairs (assembled product) -not include nickel release (en iso 12870)turnaround time: 13-15 working days (regularservice)remarks:1. designed reference points shall be providedby manufacturer. (default to box center if no information isprovided.2. *same lens/ frame - same materials and samesize and same color.3. this standard covers those reading glasseswith nominal spherical power within the range from +1.00 to +3.50dioptres.4. ce mark (at least 5 mm in height ) isrequired under 93/42/eec medical device directive.
sample for reference参考图片:
sample for reference参考图片:
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