1.Preparation before optometry: turn on the power, adjust the height and level of the instrument, optometry disc, projector in the state of use before operation. 2.Objective examination: computerized automatic optometry or retinal shadowing to detect the refractive data of the eye being tested, record the results. Preset the objective optometry data on the optical disc, the steps are as follows: (1) input the objective optometry data into the optical disc, right eye first and then left eye; (2) verify the objective optometry results monocular corrected visual acuity close to or better than 1.0. 3, far fog vision (simultaneous equal amount of both eyes) (1) on the basis of the objective data, both eyes at the same time to add positive lenses (minus negative lenses); (2) the subject from the best vision fog vision to 0.3 visual acuity. Recommendation: To gradually loosen the adjustment, it is recommended to use the sight marker to fog the vision line by line. (4) Astigmatism examination by astigmatism disc (monocular examination, objective examination without astigmatism, this procedure can be ignored) (1) close the left eye (right eye open); (2) incremental negative mirror (minus positive mirror) to mobilize the visual acuity of the right eye to 0.6 ~ 0.7. (objective examination pre-set column lens, remove the pre-set column lens); (3) put the astigmatism disc sight marker, ask the subject to identify the astigmatism disc lines clarity is consistent; (4) consistent without astigmatism (5) The clear line corresponds to the clock decimal multiplied by 30, which is the axis position of the astigmatic eye; (6) Adjust the axis position of the column mirror to the axis position of the astigmatic eye, and increment the column mirror until the measured eye says that the lines of the astigmatic disc are consistent in clarity. 5, the initial red and green detection or MPMVA (precise spherical lens degree) (1) red and green detection: put the red and green two-color visual indicators, asked the subject to identify the red and green visual table clarity, such as red clear add negative mirror minus positive mirror (vice versa minus negative mirror plus positive mirror), until the red and green and other clear. (2) MPMVA test: incremental negative mirror to the best visual acuity, the lowest negative mirror degree or the highest positive mirror degree, the end point for further increase -0.25D visual acuity no longer improve. Suggestion: the actual optometry red and green bichromatic detection and MPMEA should be applied in combination with each other. 6, JCC crossed cylindrical mirror precise detection column mirror specimen axial (fine adjustment astigmatism axis) (1) put the foveal vision mark; (2) will be 0.25D crossed column mirror handle (flip wheel) and predicted astigmatism axis overlap, flip to compare before and after (two sides) clarity is consistent; (3) if inconsistent will be crossed column mirror mirror stop in the clear side. Turn the axis position to the negative axis 10 degrees (or 5 degrees, chasing the red dot), then flip to compare, adjust the axis position until the flip before and after (two sides) equal clear. 7, JCC crossed cylindrical mirror precision detection column mirror specimen focal length (fine adjustment astigmatism) (1) still use the foveal sight marker; (2) will be 0.25D crossed column mirror negative axis (letter P position) and the predicted astigmatism axis coincide, flip to compare before and after clarity is consistent; (3) if inconsistent will be crossed column mirror mirror stop in the clear surface, such as the negative axis (red dot position) and the predicted axis coincide surface clear, plus column mirror -0.25D ( red ascending), such as positive axis and the prediction axis overlap surface clear minus column mirror -0.25D (white descending), again flip comparison until the flip before and after the clarity of the two sides consistent. Note: add column minus 1/2 ball, minus column plus 1/2 ball, equivalent mirror degree. 8, the second red and green optic mark detection or MPMVA method with the same procedure 5. (End of right eye) 9. Repeat steps 4 ~ 8 for the left eye Same method as before. (End of monocular testing) 10, MPMVA or red and green visual marker testing in both eyes. 11, dominant eye test (1) project a single visual standard; (2) arms extended, palms of both hands in front of the eyes, crossed to form a viewfinder frame, both eyes look at the standard from the viewfinder frame; (3) the optometrist alternately covers the left and right eyes, the annotated visual standard does not move the dominant eye (dominant eye). 12, binocular refractive balance detection (1) prerequisite: both eyes synchronize equal amounts to do light fog vision to 0.7 ~ 0.8 visual acuity; (2) method: A, polarization fractional vision method: (1) both eyes are front polarization auxiliary lenses (P135, P45); (2) project polarization three lines of visual markers (ask whether to see three lines of visual markers, is to enter the next step.) ; (3) alternately cover the left and right eyes, distinguish between the two eyes to see 1, 2 rows and 2, 3 rows of visual acuity; (4) ask them to identify whether the 1, 3 rows of visual acuity is consistent, such as inconsistent, minus clear eye -0.25D, until the 1, 3 rows of visual acuity seen by both eyes are consistent; 5) MPMVA or red and green detection, adjust both eyes to the best visual acuity. B, prism splitting method: (1) both eyes are front rotating prism (0 position to the horizontal), one eye set 3△ BU (visual marker shift down), the other eye set 3△ BD (visual marker shift up); (2) projection suture fossa visual marker (ask whether to see the upper and lower two visual markers, is to go to the next step.); (3) set 3△ BU (visual marker shift down), the other eye set 3△ BD (visual marker shift up). (3) set 3△BU eye to see the lower line of the visual acuity, set 3△BD eye to see the upper line of the visual acuity; (4) asked to identify the upper and lower lines of the visual acuity is consistent, such as inconsistent, minus clear eye -0.25D, until both eyes see the upper and lower line of the visual acuity consistent; (5) MPMVA or red and green detection, adjust both eyes to the best vision. 13, adjustment amplitude detection ( detection of the tested eye adjustment) (1) close the collection button, open the near-reading illumination; (2) put down the near-eye marker plate, using the near-crossing lattice visual marker; (3) near-crossing lattice visual marker moved to 33cm; (4) both eyes add 0.50D crossed cylindrical mirror; (5) asked to identify the crossed lattice horizontal and vertical line clarity is consistent; (6) if the horizontal line is clearer than the vertical line, indicating (6) If the horizontal line is clearer than the vertical line, it means that the adjustment range is less than the detection distance to cope with the adjustment, add positive spherical lens to the horizontal and vertical equilibrium, record the addition of positive mirror degree; (7) If the vertical line is clearer than the horizontal line, it means that the adjustment range is greater than the detection distance to cope with the adjustment, add negative spherical lens to the horizontal and vertical equilibrium, record the addition of negative mirror degree; (8) the measured eye adjustment power = detection distance to cope with the adjustment – add the mirror degree Note: The premise is that the full correction of the far refraction 14, near with the addition of degree Prerequisite The eye is clearer in the horizontal line than in the vertical line, with insufficient adjustment power and old vision. (1) The eye’s adjustment power is tested and 1/3 of the eye’s adjustment power is retained (in order for the eye to meet the near reading ability for a certain period of time); (2) the available adjustment power = the eye’s adjustment power – 1/3 = 2/3; (3) the eye’s habitual near working distance is checked and the working distance should be adjusted (working distance 1/m); (4) the degree of presbyopia accession = working distance Adjustment power payable (D) – Adjustment power available (D’) ADD = D – D’