Crossbows Optical: Petite

Crossbows Petite

Features of design

Short corridor (14mm to full addition power)
Minimum fitting height of only 15mm
Low distortion soft, aspheric design
Individual designs for left and right eyes
Moulds in 1.498, 1.56 and 1.60 indices

The Petite progressive is designed specifically for frames with small eye sizes. This is achieved in a soft design without compromising the distance, corridor and reading areas.

Progressive Petite Moulds 1.498, 1.56 and 1.60 Index

Short Corridor Design Base Curve and Addition Range for Ø81mm moulds:

Nom Base	True Base n=1.530	Additions
Nom Base	True Base n=1.530	1.00	1.25	1.50	1.75	2.00	2.25	2.50	2.75	3.00
1.50	1.40	•	•	•	•	•	•	•	•	•
3.50	3.40	•	•	•	•	•	•	•	•	•
5.75	5.70	•	•	•	•	•	•	•	•	•
7.75	7.75	•	•	•	•	•	•	•	•	•

Note:

Ø81 mould is designed to produce Ø75/81mm Progressive lenses when used with gaskets.
For 1.67 index moulds the Base Curve and Addition Range is to customers own specification, subject to tooling charges.
Other diameters and specific edge configurations are possible, subject to additional charges.
Moulds with a centred design are also available for the manufacture of finished progressive lenses, subject to additional charges.