Metric unit method of vision and equipment for examining vision

Metric unit method of vision and equipment for examining vision

CN
  • CN 100,500,081 C
  • Filed: 04/11/2000
  • Issued: 06/17/2009
  • Est. Priority Date: 04/11/2000
  • Status: Active Grant
First Claim
Patent Images

1. annotate the eyesight measurement device that distant vision numerical value is formed by each rower of hypermetropia measuring distance, sighting target hurdle and sighting target for one kind, it is characterized in that:

  • first kind vision ultimate unit numerical value or decimal unit amount----that each row of sighting target hurdle must mark are shape feel distant vision H FarOr E Far, distant vision Z commonly used FarOr L Far, practical distant vision U Far, wantonly a kind, times is multiple among four kinds of the practical percent P of distant vision;

    The distant vision record----that can mark or not mark another kind of reservation is distant vision decimal record V 1 is far away, distant vision visual angle logarithm record L 1 is far away, distant vision five decilogs records L 2 is far away, national standard distant vision record, distant vision mark record V 2 is far away, V 3 is far away, V 4 is far away, V 5 is far awayAmong wantonly a kind, times multiple.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×