Final answer:
The three signs of increased intraocular pressure are deformation of the eye, vigorous rebound, and the development of glaucoma.
Step-by-step explanation:
The three signs of increased intraocular pressure are:
1. Deformation of the eye: When the intraocular pressure is high, the eye will deform less than normal.
2. Vigorous rebound: High intraocular pressure causes the eye to rebound more vigorously than normal.
3. Glaucoma: Increased intraocular pressure can lead to a condition called glaucoma, which can cause permanent damage to the optic nerve.