A professional who inspects optical glass immersed in chemical bath, to detect striae (internal stresses). Responsibilities include:

• Selects premixed chemical solution or mixes liquid chemicals in tank according to refraction index and grade of glass.
• Immerses glass in bath and focuses burton lamp, collimating light, or striae scope on glass to detect internal stresses (striae).
• Marks defective areas with pencil.
• Writes inspection results and maintains permanent records for each melt.
• Sorts and grades glass according to type of defect noted.
• May operate transmission machine to examine glass for strain.
• May saw glass stock.