-
chart used to
measure visual acuity comprising lines of
optotypes in
ranges of sizes.
Optotypes are the
letters or
symbols shown on an eye chart. Eye charts...
- an
acuity chart are
formally known as "
optotypes". In the case of the
traditional Snellen chart, the
optotypes have the
appearance of
block letters, and...
-
involves more than
being able to see the
optotypes. The
patient should be cooperative,
understand the
optotypes, be able to
communicate with the physician...
-
value of the best line read – 0.02 X (number of
optotypes read)
Given that each line has 5
optotypes, the
equivalent formula is:
LogMAR VA =
LogMAR value...
- 2.25. PMC 2652120. PMID 18217840. The
visual resolution of Landolt-C
optotypes in
human subjects depends on
their orientation: the 'gap-down' effect...
-
visual acuity. As is
desirable of a good
vision test, each of the four
optotypes used in the
symbols test has been
proven to
measure visual acuity similarly...
- 1959, are a set of
optotypes used to test
visual acuity generally used in
Snellen charts and
logMAR charts. This set of
optotypes consists of ten specially...
- The most
significant innovation was Snellen's use of what he
called optotypes,
specially designed characters generated on a 5x5 grid,
rather than using...
-
resolution of 2
arcminutes per line pair,
equivalent to a 1
arcminute gap in an
optotype,
corresponds to 20/20 (normal vision) in humans. However, in the compound...
-
creation of the
Sloan letters, used to test
visual acuity.
These ten
optotypes,
according to Sloan, were
specifically chosen from
capital letters of...
