A Lendmeter ama Lensmeter ama Lensmeter, ayaa sidoo kale loo yaqaan 'diimibee' ama vertomiterter, waa aalad ophthalmic ah. Waxaa inta badan loo isticmaalaa indhaha indhaha iyo takhaatiirta indhaha inay ku caddeeyaan dawada saxda ah ee ku qoran labo muraayad ah, si ay ugu jiheeyaan iyo calaamadaha muraayadaha indhaha, iyo in la xaqiijiyo saliida saxda ah ee muraayadaha indhaha.