Compared with the spectacles, the visual field of wearing a contact lens is()
A. Bigger
B. Smaller
C. The same
D. None of the above
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Which of the following is not an indication for contact lenses()
A. Diabetes
B. Corneal astigmatism
C. Anisometropia
D. High myopia
Which of the following is a routine examination before refractive surgery()
A. Refractive status
B. Corneal thickness measurement
C. Pupil diameter measurement
D. All of the above
The Orthokeratology flattens the cornea, changing the()of light entering the eye and focusing the light on the retina
A. wavelength
B. refractive power
C. velocity
D. reflectivity
Refractive surgery includes()
A. Corneal refractive surgery
B. Iris refractive surgery
C. Intraocular refractive surgery
D. Extraocular refractive surgery