RSLDs use their knowledge of optics and mathematics to fill prescriptions written by doctors and determine the eyeglass frame and lens combination that best fits the customer's vision needs. They help select the right material and lens design to fit the customer's life style and facial measurements, and then prepare a work order for the laboratory. When the finished glasses are returned from the laboratory, RSLDs use optical tools and gauges to make sure that the glasses match the work order.
Opticians adjust glasses to fit their customers comfortably.
Some Dispensing Opticians also grind and polish the lenses and mount them into frames. RCLDs fit contact lenses by measuring the shape and size of the eye. They select the type of contact lens material and train the wearer to insert and remove the lenses and clean and maintain them properly. Opticians use various instruments to help select and fit contact lenses for their customers. They work in retail optical stores and in eye clinics.