VAwrapper: VA conversion wrapper

In eye: Analysis of Eye Data

Description

Simple convenience wrapper around va to get desired VA class

Usage

to_logmar(x, ...)

to_etdrs(x, ...)

to_snellen(x, ...)

as_logmar(x, ...)

as_etdrs(x, ...)

as_snellen(x, ...)

Arguments

x	vector of visual acuities
...	parameters passed to va

Value

vector with visual acuity of class as_(...) or to_(...) See also convertVA: "VA classes"

VA conversion

For details see va and convertVA

See Also

Other VA converter: plausibility_methods, snellen_steps, va_methods, va_mixed(), va(), which_va()

Examples

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")

eye documentation built on Sept. 5, 2021, 5:25 p.m.