3
Positive refractive power lenses are marked with a + symbol
before the dioptre, the negative power lenses are marked with a -.
Prismatic lenses are preceded by a
∆
symbol. The accessories are
marked with normalised letters.
In order to allow an easy recognition of the type of lens (spherical,
cylindrical, prismatic, accessory) the set is subdivided in sections
each containing a different type. Such sections are marked with
labels for easy recognition.
The 260 lenses’ set contains:
•
39 pairs of spherical lenses, positive and negative
•
20 pairs of cylindrical lenses, positive and negative
•
14 prisms from 1° to 10°
•
10 accessories
The 167-lens set contains:
•
26 pairs of spherical lenses, positive and negative
•
13 pairs of cylindrical lenses, positive and negative
•
5 prisms from 1° to 5°
•
6 accessories
All products are Class I (without measuring function) and comply
with the
marking, regulation 2017/745/UE.
ESS260 / ESS026
Dimensions
Weight
Life cycle
Date of 1
st
marking
ESS167
462 × 322 × 95 mm
(18 x 13 x 4 in)
3
.
9 kg
(8.6 lb)
10 years
1998
462 × 370 × 95 mm
(18 x 15 x 4 in)
4
.
8 kg
(10.6 lb)
10 years
2006 / 2015
