For Visual acuity levels beyond the limit of the letter charts, the common practice is for clinicians to categorize vision according to whether the patient can count fingers (CF) or detect hand motion (HM), but there is no recognized or standard procedures for doing this.
The Berkeley Rudimentary Vision Test (BRVT) was developed to enable efficient and easy measurement of visual acuity beyond the limits of the letter chart. It becomes necessary to make the test task simpler than the letter chart task and, in order to achieve very large angular sizes, very close viewing distances may be required. In the interests of simplicity and flexibility of use, the BRVT has 3 card-pairs. Each card pair consists of two 25 cm square hinged cards so each card-pair has 4 target surfaces.
Dimensions: 17 × 11 × 2 in
Translucent Chart: No
Chart Notations - LogMAR: .4 to -0.3
Chart Comes with: Test Instructions, Recording Forms
Chart Notations - Decimal: 2.0 to .001
Chart Notations - 4 meter: 4/4000 to 4/2.0
Chart Notations - Diopters: 50.00 to 1.00
Chart Notations - 6 meter: 6/6000 to 6/3
Cord: No
Chart Notations - Munit: 40M to 1M
Contrast Level: High
Utilize with which Cabinet: None
Utilize with a Cabinet: No
Optotype: TUMBLING E
Optotype Arrangement: Single Letter or Symbol
MassVAT Chart: No
ETDRS Format: No
Chart Distance: Multi-Distance
Chart Size (Inches): 12×14 in
Chart Size (cm): 37×28 cm
