eye - Analysis of Eye Data
There is no ophthalmic researcher who has not had
headaches from the handling of visual acuity entries. Different
notations, untidy entries. This shall now be a matter of the
past. Eye makes it as easy as pie to work with VA data - easy
cleaning, easy conversion between Snellen, logMAR, ETDRS
letters, and qualitative visual acuity shall never pester you
again. The eye package automates the pesky task to count number
of patients and eyes, and can help to clean data with easy
re-coding for right and left eyes. It also contains functions
to help reshaping eye side specific variables between wide and
long format. Visual acuity conversion is based on
Schulze-Bonsel et al. (2006) <doi:10.1167/iovs.05-0981>,
Gregori et al. (2010) <doi:10.1097/iae.0b013e3181d87e04>, Beck
et al. (2003) <doi:10.1016/s0002-9394(02)01825-1> and Bach
(2007) <http:michaelbach.de/sci/acuity.html>.
