Nidek Medical ARK-1S, Operator'S Manual, Page: 108 / 112

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SPECIFICATIONS AND TECHNICAL INFORMATION: Glossary and Abbreviations
O
Abbreviations
Printing of eye diagram Eye diagram of refractive status of the patient’s eye based on the AR median
values (or the latest values when the median values have not been obtained)
or the subjective measured values when the subjective measurement has
been performed. There are eight eye diagram patterns.
Emmetropia Myopia Hyperopia Astigmatism
Myopic astigmatism Hyperopic astigmatism
Simple myopic astigma-
tism
Simple hyperopic astig-
matism
Term Details
PS Abbreviation of Pupil Size
SE (Spherical Equivalent)
value The value that is 1/2 of the cylindrical error added to the spherical error. Cal-
culated for the AR median values (the latest values when the median values
have not been obtained), subjective measured values, and CL conversion
values.
Sleep mode After the preset time of non-actuation, the screen automatically shuts off to
save power consumption.
Pressing any button restores the screen to the ON condition.
Trial lens data These are the values that were converted automatically from the cylinder val-
ues so that the sphere values for the trial lens become smaller based on the
AR median values (the latest values when the median values have not been
obtained).
Vertex distance The distance between the corneal vertex to the posterior surface of spectacle
lenses
AI Artificial Intelligence MD4 Message Digest Algorithm 4
CA DMV California Department of Motor Vehicles NCP10 Nidek Communication Protocol - 10
CL Contact Lens NTSC National Television System Committee
COI. H Central Opacity Index - Height POI Peripheral Opacity Index
COI. A Central Opacity Index - Area RF Radio Frequency
DHCP Dynamic Host Configuration Protocol SE Spherical Equivalent
EEPROM
Electrically Erasable Programmable
Read-Only Memory
UCVA Uncorrected Visual Acuity
EMC Electro-Magnetic Compatibility USB Universal Serial Bus
IC Integrated Circuit VA Visual Acuity
ID Identification VD Vertex Distance
IP Internet Protocol WD Working Distance
JPEG Joint Photographic Experts Group
Term Details