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Intraocular pressure is measured with a

  1. Gonioscope

  2. Phoropter

  3. Retinoscope

  4. Tonometer

The correct answer is: Tonometer

Intraocular pressure is measured using a tonometer. A tonometer is specifically designed to measure the pressure inside the eye, which is important for diagnosing conditions such as glaucoma. A Gonioscope is used to examine the angle of the anterior chamber of the eye. A Phoropter is a device used during a refraction test to determine the appropriate prescription for corrective lenses. A Retinoscope is used to determine an objective measurement of refractive error.