Explain the type of chart used to test visual acuity in young children. . When is it appropriate to use the tympanic thermometer when taking a child’s temperature? . When taking an infant’s rectal...

Explain the type of chart used to test visual acuity in young children. . When is it appropriate to use the tympanic thermometer when taking a child’s temperature? . When taking an infant’s rectal temperature, what precautions should be taken?