Tonometry
Simi afroz
, Introduction
• Tonometry : It is a clinical technique that provides a measurement of the eye , w
includes the combined resistance to deformity of its coats and the intraocular
pressure (IOP).
•Tonometer –It is the device used for
measuring the Intra ocular pressure.
,IOP VARIATIONS
• Physiological variations: IOP normally fluctuates 2-5 mm Hg throughout the day.
• With respiration and heart beat.
• With venous pressure
• Arterial pressure
• Osmotic pressure of blood.
• Local mechanical factors :
• dilatation of the pupil
• changes in the solid content of the eye
• pressure from outside
, • Pharmacological factors:
The ciliary muscle is inserted into the
trabeculae , so the contraction of the ciliary
muscle makes the trabecular meshwork of more
•
porous -> increases the facility outflow -> reduces
IOP outflow facility reduction of aqueous
production atropine
Simi afroz
, Introduction
• Tonometry : It is a clinical technique that provides a measurement of the eye , w
includes the combined resistance to deformity of its coats and the intraocular
pressure (IOP).
•Tonometer –It is the device used for
measuring the Intra ocular pressure.
,IOP VARIATIONS
• Physiological variations: IOP normally fluctuates 2-5 mm Hg throughout the day.
• With respiration and heart beat.
• With venous pressure
• Arterial pressure
• Osmotic pressure of blood.
• Local mechanical factors :
• dilatation of the pupil
• changes in the solid content of the eye
• pressure from outside
, • Pharmacological factors:
The ciliary muscle is inserted into the
trabeculae , so the contraction of the ciliary
muscle makes the trabecular meshwork of more
•
porous -> increases the facility outflow -> reduces
IOP outflow facility reduction of aqueous
production atropine
