Lenses and magnifying glasses don't only help our scientists to see clearly and find important papers on their desk, they are also necessary in order to invent all the new technologies that make us so proud. The optician keeps everything we need carefully stored in boxes, so less things get lost and the demand for Crystal Glass is decreased per building level.
Notes[]
Every level of the Optician lowers demand for by 1% per expansion (only in the town it is built).
This building will also reduce the cost of Experiments done in the Academy by up to 32%.
Note: At the maximum level of the Academy, the cost stays at 300,000 , but the produced research points will rise by the reduction amount.
Example: At level 25 experiments produce 200,000 = 150,000 / (1.0 - 0.25) = 0.75
This building will not affect donations to the Miracle on the island or training of Spies in the Hideout.
Explanation of Reduction Buildings
All reduction buildings add their deduction percentage to that given by Pulley, Geometry and Spirit Level. This means the actual discount is an additional 1%per level of the reduction building, plus the reduction from the level of research you have completed. For example, a Level 1 reduction building combined with Pulley has a net of 3% reduction, with Geometry there is a net of 7%, and with Spirit Level there is a net of 15%. With the maximum level of reduction buildings (Level 50, 50% reduction) and Spirit Level (14%), the maximum reduction for that resource is 64%. This means you use only 36% of the original cost.
Research and Reduction Building bonuses are shown in the following charts by mousing-over over the research abbreviations (P – G – SL – MR) in the chart.
You can mouse-over the letters in the "Minimum " column to see how many Warehouses are needed for that level.
You can also mouse-over the numbers in the "Build " column to get the longer version of what the numbers/Letters represent.
These reductions are separate and in addition to the researches, for up to an additional 50% reduction. providing a minimum of 64% reduction in resources.
An Architect's Office reduces requirements by 1% for every level built. (up to 50%)
A Carpenter reduces requirements by 1% for every level built. (up to 50%)
A Firework Test Area reduces requirements by 1% for every level built. (up to 50%)
An Optician reduces requirements by 1% for every level built. (up to 50%)
A Wine Press reduces requirements by 1% for every level built. (up to 50%)
These increases are separate and in addition to the production buildings, for 7 day increments, making the maximum possible increase in production 172%.
demand
and 
to build the Academy and the Temple, as well as the Palace and the Governor's Residence in higher levels.
