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1.56 Ma lens owoneka bwino a HMC
Magalasi a Progressive lens ndi ma lens atali otalikirapo ambiri, osiyana ndi magalasi owerengera akale ndi magalasi owerengera a bifocal.Magalasi opita patsogolo alibe kutopa kwa mboni zamaso zomwe zimafunikira kusintha nthawi zonse utali wokhazikika mukamagwiritsa ntchito utali wa bifocal, ndipo palibe mzere wodziwikiratu pakati pa utali wapakati pawo.mzere wa malire.Ndiwomasuka kuvala ndi maonekedwe okongola, ndipo pang'onopang'ono wakhala chisankho chabwino kwambiri kwa anthu omwe ali ndi presbyopia.
