Intraocular pressure measurement is not necessary for every child because glaucoma is rare in this age group when present, usually has additional manifestations (e.g., buphthalmos epiphora, photosensitivity, and corneal clouding). Intraocular pressure should be measured whenever glaucoma or its risk factors exist. Because IOP measurement can be difficultin some children, a separate examination with the patient sedated or anesthetized may be required. The introduction of more compact instruments such as the Tono-Pen (Reichert Inc., Depew,New York) Perkins tonometer (Haag-Streit UK Ltd., Harlow, United Kingdom), and care rebound tonometer (care Finland Oy, Helsinki, Finland) have facilitated testing of IOP in children. central cornea thickness measurement may be helpful in the interpretation of IOP