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Presbyopia makes it
to focus on
up close. Sufferers make the text on phone and computer screens
. Allergan said its eye drops could help people see three
on an eye chart that would normally be blurred. Clinical studies showed that people who used Vuity every day did
on eye chart tests. They achieved a 3-line gain or more when reading a near-vision eye
. The eye drops work by reducing the eye's
size. This helps people to focus on
and objects that are
them. A user who tested the drops said they helped him to see smaller
.
