What Is a Retinoscope?

If the direction of pupil reflection is the same as the direction of rotation of the inspection mirror, it is called forward motion, which is the positive image seen in the fundus image; if the opposite direction of the two is reversed, the fundus image is the inverted image; if Pupil reflections that do not show significant movement are called immobile.

The inspection mirror uses the illumination system of the inspection mirror to illuminate the inside of the eyeball, and the light is reflected back from the retina. These reflected light changes after the refractive component of the eyeball. The refractive state of the eyeball can be judged by checking the change of the reflected light .

Name: Inspection mirror

category: Ophthalmology

Normal value of inspection mirror

Clinical Significance

Abnormal results: (1) Two optical bands were seen in the pupil area during shearing, one was moving in the other and the other was reversed, such as scissors opening and closing, due to the lens being tilted, corneal scars, or irregular astigmatism in the examined eye. (2) Spherical aberration and negative spherical aberration (caused by keratoconus).
People to be examined: patients with myopia or hyperopia and astigmatism.

Precautions for Spectacles

Unsuitable population: patients with inflammation of other eye diseases.
Contraindications before examination: Pay special attention to corneal turbid scars, vitreous opacity, nystagmus, strabismus and amblyopia.
Requirements during inspection: The inspection distance and the subject are only directions.

Inspection mirror process

Photographic operation method: The examiner sits facing the patient at a distance of one meter. The patient wears an audition frame. The center of the frame circle should be placed at the center of the pupil of the eye to be examined. Cover the other eye with a black film, and let the patient look at the upper edge of the flat mirror on the inspection mirror. Then shoot the light source into the patient's pupil area, peek at the reflection of the patient's pupil from the back of the small hole in the center of the speculum, and turn the speculum slightly up and down or left and right, and you can see the red-yellow or yellowish light Move in the pupil area.