Hitomi-test shadow optometry pros and cons

Chang is the most widely pupil optometry, optometry technology is relatively mature way. Often pupil radioscopy optometry pupil is often one of the more important part, is now widely used in the medical optometry. Here's a quick introduction for you often radioscopy pupil strengths and weaknesses, so you know more about Cheap Ray Ban Sunglasses knowledge.

Often pupil Radioscopy disadvantages:

1, often pupil aperture area is very small, only 4.9-12.6 mm 2, under the conditions of dilated aperture 5% to 12%, so in accordance with difficulties, and by specially trained can not whom.

2, this method, because what-have for high tension adjustment is controlled, prone to negative values mirror degree offset. Experienced optometrist clouds slow adjustment method can be used, reasonable handling skills to carry out corrective lenses, can generally be adjusted to get the satisfactory control.

Often pupil Radioscopy advantages:

Often pupil Radioscopy advantage is obvious, but the disadvantage is can be overcome, so far, Ray Bans Outlet Sunglasses also widely used in hospital optometry and corrected.

1, light holes projection to be accurate;

2, on the observation of light and shadow to stabilize and correct;

3 and its operating practices to be accurate and reasonable;

4, optometry process faster and not chaos;

In short, optometry process should be done: accurate, stable, precise, fast, and often regarded as a pupil radioscopy saving, accurate, ideal refraction method has no side effects.

Now the majority of computer optometry + Cheap Ray Bans sunglasses mainly accuracy and applicability are very high, but often pupil radioscopy optometry medical field method is also irreplaceable method.