Lens
Object number2010.52.4 a-f
Manufacturer
Transitions Optical, Inc.
Date2008
MediumPlastic
Credit LineGift of Transitions Optical Inc.
DescriptionSix (6) circular transitions lenses. Three (3) transbonded gray lenses and three (3) transbonded brown lenses.DimensionsDiameter x Depth (a): 2.75 × 0.313 in. (7 × 0.8 cm)(b-f) Diameter: 2.687"
Marks(a-c)
Reads: "TRANSITIONS VI / TRANSBONDED GRAY" across bottom.
(d-f)
Reads: "TRANSITIONS VI / TRANSBONDED BROWN" across bottom.
Historical NotesLenses from Transitions Optical, a subsidiary of Pittsburgh Plate Glass Company.Label TextTransitions lenses remain clear at night or in dim lighting, but automatically darken in bright light. The lenses block 100% of harmful UVA and UVB rays, helping to protect the eyes. In 1990, Transitions Optical, then majority owned by PPG Industries, became the first to successfully manufacture and commercialize a plastic photochromic lens.
Related institution
Pittsburgh Plate Glass Company
(1883 - 1968)
On View
On view
David White Company
Morris Labowitz
