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Simple convenience wrapper around va to get desired VA class
to_logmar(x, ...)to_etdrs(x, ...)
to_snellen(x, ...)
as_logmar(x, ...)
as_etdrs(x, ...)
as_snellen(x, ...)
vector of visual acuities
parameters passed to va
vector with visual acuity of class as_(...) or to_(...) See also convertVA: "VA classes"
Other VA converter:
plausibility_methods
,
snellen_steps
,
va_methods
,
va_mixed()
,
va()
,
which_va()
# NOT RUN {
x <- c(23, 56, 74, 58) ## ETDRS letters
to_logmar(x)
to_snellen(x)
to_snellen(x, type = "dec")
x <- c("NLP", "0.8", "34", "3/60", "2/200", "20/50", " ", ".", "-", "NULL")
to_snellen(x, from = "snellendec")
to_snellen(x, from = "etdrs")
to_snellen(x, from = "logmar")
# }
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