The CSV-1000RS test face is used widely for screening refractive surgery patients. The test presents ETDRS LogMAR acuity from 20/10 to 20/100 and one row of spatial frequency at 12 cycles/degree.
The patient can be easily screened in the examination chair for ETDRS acuity and contrast sensitivity. If a contrast sensitivity deficit is found, retesting the patient with all four spatial frequencies using the CSV-1000E is recommended.