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What is it? |
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IOP (Intra Ocular Pressure) is the fluid pressure inside the eye. |
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What is it done for? |
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IOP is done with the help of tonometer and the technique is known as
tonometry.IOP is an important aspect in the evaluation of patients at risk from
glaucoma.The tonometers are calibrated to measure pressure in millimeters of
mercury(mmhg). |
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How is it done? |
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IOP is measured with the help of tonometer.It can be measured by non contact
tonometer,schiotz tonometer ,applanation tonometer and digital tonometry.IOP is mainly
determined by the coupling of the production of aqueous humour and the drainage of
aqueous humour mainly through the trabecular meshwork located in the anterior chamber
angle.An important quantitative relationship is provided below;
IOP= F/C+PV
F =aqueous fluid formation rate.
C =outflow rate ,PV = episcleral venous pressure .
The above factors are those that derive IOP. |
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What are the benefits? |
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IOP is an important aspect in the evaluation of patients at risk from glaucoma which
may lead to blindness. |
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What are the limitations? |
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Corneal thickness and rigidity influence the IOP.
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How much time is taken? |
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The time taken is between 5 to 10 minutes depending on patients cooperation. |
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When is to be repeated? |
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It can be repeated on every routine eye check up or as advised by the doctor. |
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What are other alternative tests? |
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IOP test,Eye pressure test and tonometry .
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What is the expense? |
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It is a part of routine eye check up so it is included in consultation charges which
may vary from one hospital to the other hospital. |
