Refractometer Operating Procedures

At present, optometry is very common, all optical shops, including hospitals and optometry center is a must master the skills. Now on the optometry process to talk about some aspects of the details.

1. Comprehensive optometry optometry aims to allow customers to final optometry after the end, get a clear vision. The purpose of general optometry: clear vision, comfortable eyes, lasting reading.

2. Preparation of optometry: computer test light single, integrated refractometer disinfection, the level of equipment adjustment.

3. fog as: usually monocular fog for the computer optometry results minus 1.50D, making the patient can see the 0.3 visual acuity chart. Note: As in the process of fog as monocular can clearly distinguish the visual standard, his eyes increased by 0.25D ~ 0.50D, to maintain the standard in a fuzzy state.

4. To fog as seen: the patient watched as about 5 minutes, and then gradually increase the negative spherical. Until the patient can see the best target so far. To the fog after the completion of the first single-eye red and green balance, red and green balance to follow the principle of red and green reduction. Sometimes the red and green balance of patients can not completely fully guarantee that the red and green as clear, you can increase -0.25D, so green as clear, and then adjust the attached lens wheel +0.12.

5. If the patient has astigmatism need to fine adjustment of astigmatism: through the cross-cylinder mirror to detect astigmatism axial and astigmatism, cast honeycomb as standard, adjust the cross cylindrical lens handle on the axis. If you use a loose disc to detect the astigmatism axis, the initial test to fog as can not make the visual acuity of 1.0, but to achieve the 0.7 as the standard can.

6. Determination of astigmatism axis: flip cross cylindrical lens which asked the patient which side of the lens clear, if both clear, axial adjustment of the end. One side clear, the other side is not clear, in the clear surface adjustment axis, chasing red dot. When the astigmatism is greater than 1.00, chase 5, retreat 2; when the astigmatism axis is less than or equal to 1.00, chase 10, back 5.

7. fine tune astigmatism: ask patients on both sides which side clear, such as both clear and end. Not as clear, in the clear surface, red dot on the axis that astigmatism correction, increase -0.25D astigmatism. If the white point on the axial description of astigmatism overcorrection, reduce -0.25D astigmatism. Increase or decrease -0.25D and then flip, as clear, end. Such as clear face change is not clear, lost -0.25D end. Note: increase or decrease 0.50D cylinder, the same time to reduce the ball 0.25D.

8. After the determination of astigmatism again red and green balance. After the balance of red and green monocular detection is completed, the left eye detection above.

9. eyes balance: two glasses at the same time by 0.75D. Here I use the prism separation method to detect binocular balance. Right eye front 2 △ bottom down the prism, so that the target as the top shift, the left eye front 2 △ bottom of the prism, so that the target as the bottom shift. Eyes when watching the same as the standard, you can see the upper and lower two as the standard, after the separation of the eyes, you can compare the same field of vision in the eyes of the corrected visual quality. Eyes at the same time watching as the standard, the amount of synchronized with the eyes plus -0.25D spherical, until the eyes to see 1.0 as standard.


1. The above optometry steps are the first eye after the left eye, are aimed at myopic optometry steps.

2. Optometry is a professional and technical, work will encounter a variety of patients, we need our optometrist gradually accumulate experience.