Eye Chart Projector and Visual Acuity Systems

  1. Chart Projector

  2. An AC-powered device intended to project an image on a screen for vision testing. The projector creates images of letters and symbol charts used during a normal eye examination. The patient reads off the projected letters and symbols while viewing them through a combination of different lenses, allowing you to evaluate and assess the vision needs.
  3. Keratometer

  4. This diagnostic tool is used to measure the curvature of the anterior surface of the cornea in a person's eye. This is most commonly used for diagnoses of astigmatism and for establishing the degree of astigmatism. Some of the latest keratometers use optical sensors and computer technology to measure the curvature of the cornea against specific parameters .
  5. Slit Lamp

  6. Is used to observe the health of the cornea, the iris and the lens. Your optician will ask you to place your head against a frame and your chin in a rest while the optician looks through a powerful microscope at each eye in turn.
  7. Field screener

  8. This equipment is used to check that you see things that you are not looking at directly. Whilst conducting the test you have to look at a little spot in the centre of the machine (to keep your eye still) and respond when you see the target (usually a light that flashes on and off once), which will appear on another part of the screen.
  9. Trial lenses

  10. Small numbered lenses that fit inside the trial frame.
  11. Trial Frame

  12. An adjustable frame that holds trial lenses used during retinoscopy or refraction tests on the eye.

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