ČSN EN ISO 4007 (Zruš.) - Osobní ochranné prostředky - Ochrana očí a obličeje - Slovník

5.2.3 face form angle

angle between the plane of the eye-protector (5.1.1) front and the plane of the right ocular shape, or of the plane of the left ocular shape

NOTE 1 The plane of the eye-protector front is the plane containing the vertical centrelines of the right and left boxed ocular shapes, and the plane of the ocular shape is the plane tangential to the front surface of a plano ocular at its boxed centre, when mounted in the frame.

NOTE 2 The right or left face form angle is regarded as positive if the temporal side of the right or left ocular is closer to the head than the plane of the eye-protector front.

NOTE 3 The face form angles are often measured and specified as the average of the right ((R) and left ((L) angles, but the frame can be adjusted so that they differ for a specific wearer; the angles should then be specified as (R and (L.

NOTE 4 Adapted from ISO 8624:2011.

See Figure 3.

Key

1 point of intersection of plane of the eye-protector front with se svislou středovou osou tvaru zorníku vertical centreline of the ocular shape

2 plane of left ocular shape

3 plane of eye-protector front

4 plane of right ocular shape

(R right face form angle

(L left face form angle

Figure 3 – Face form angle (schematic representation of the plane of the eye-protector front and the ocular shapes, as seen from above)