Spectacle Lenses (Output) Mr. Baker White asked the President of the Board of Trade what was the home output of spectacle lenses in the year 1948 and the estimated output for 1949. Mr. Bevan I have been asked to reply. The total output reported by the mass manufacturers for 1948 was 6,346,246 pairs and the estimated output for 1949 is 7,700,000 pairs.