What Is The Key To Successful Fitting Of Progressive Lenses?

Accurate Optometry Is The Key To Successful Fitting Of Progressive Lenses

1. Communicate with customers and understand customers' objectives and needs for glasses;

2. Correct optometry prescription;

3. Select appropriate wearing frame and appropriate progressive lens;

4. Correct measurement of single pupil distance and pupil height, selection and adjustment of lens frame, and accuracy of processing;

5. Teach the wearer to use it correctly.

Among them, professional optometry is very important in the process of presbyopia matching. Generally speaking, the professional optometry of presbyopia includes the following aspects:

• Standard optometry: carry out standard optometry to obtain the degree and visual acuity of complete correction of far refraction;

• Near vision examination: use the near vision chart to check the near vision.The common methods of add measurement are: FCC measurement test add; measure the adjustment amplitude and use the 1 / 2 principle to calculate the add; the add is obtained by empirical method.

• Try it on to confirm that the light is added.

• Recorded data: complete record of optometry results (including far use full correction and visual acuity, near use visual acuity, experimental add and confirmed add).

  
  

1.Select the appropriate glasses

• If the frame is too large, it will increase the interference of aberration around the gradient mirror to the wearer;

• If the frame is too small, it will affect the effective field of view of the near area;

• General selection requirements include: sufficient vertical height, sufficient nasal area, firm, nose support, the welding point of mirror leg should not be too high, and too wide mirror leg should not be selected.

For the fitting of progressive lenses, we must choose the appropriate frame for consumers to ensure comfort, rather than blindly pursuing the sense of fashion. The design of progressive lens is precise and complex, and there are certain requirements for the shape and adjustability of the frame. A suitable frame can make the vision more comfortable and clear.

2. Glasses adjustment and face adjustment

Frame adjustment includes face angle, leg curvature, nose support, etc., to ensure the accuracy of wearing position.

3. Accurate parameter measurement

Accurately measure the pupil distance and pupil height to ensure that the line of sight is in the corresponding area of the lens when looking far and near.