plus lens


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con·vex lens

a converging lens.
Synonym(s): plus lens

plus lens

A convex lens used to improve visual acuity in hyperopic patients.
Synonym: convergent lens
See also: lens
References in periodicals archive ?
The PENTAX Varifocal Plus lens helps meet the needs of more precise and timesaving CCTV installation through consistent focus technology.
Adding an end cap: vergence may be corrected before it enters the telescope by adding a simple plus lens 'end cap' to the objective; this method is used typically for spectacle mounted telescopes such as those seen in Figure 8 where a distance unit is mounted onto the patient's spectacles and an additional end cap may be added converting the telescope for use at near.
Alcon's Dailies AquaComfort Plus lens utilises the addition of polyvinyl alcohol (PVA), polyethylene glycol (PEG) and hydroxypropylmethylcellulose (HPMC).
Spectacle magnifiers typically comprise one high powered plus lens or a lens combination that overall provides a high plus power, and these are mounted close to the eye.