Eye Pressure

I have been tossed in the middle of the ocean and been told I better learn to swim!

Submitted by Anonymous (not verified) on Sun, 08/22/2010 - 9:13pm

Hello - I feel as though I have been tossed in the middle of the ocean and been told I better learn to swim! I've been a glaucoma suspect for 15 or 20 years. I'm now a "strong" suspect and have some damage in both eyes. My pressure is now 21 and 22. From what the doctor has said, I won't be surprised if he puts me on drops next time.

I'm now going in for pressure readings every 3 months.

Can you feel your eye pressure before checking with the tonometer?

Submitted by robert roberts on Tue, 08/17/2010 - 10:29am

As a user of tonometry are you aware of your IOP before you do the tonometer. That is, can you feel what your IOP is likely to be before you check the pressure based on your activity before checking or your mood or emotional state?

I ask this since some people have said that they sense when their IOP is higher than usual ie., they feel the pressure. Do you feel or sense the pressure and if so has the tonometer coincided with what you think your IOP might be?



My story of my trabeculectomy

Submitted by babsy on Tue, 07/06/2010 - 11:46am

My drops were stopped when my pressure was 18 every 6 months. My pressure then went up and I kept asking to go back on drops but I was told there is no damage to my optic nerve. When the pressure reached 30 they said so sorry you now have optic nerve damage. And I have been bombarded with drops and my pressure got down to 14. After a while it went back up to 24 and I showed a bit more optic nerve damage. A trabulectomy was given as only option. My sight was 20 20 vision. To keep it I agreed  to the operation. The operation has left me blind in that eye and in awful pain.

Filed Under (tags):

Surely its perfectly normal for eye pressure to go up and down

Submitted by dave on Sat, 05/08/2010 - 9:54am

surely its perfectly normal for eye pressure to go up under certain circumstances. Just like our bp goes up and down. anne


stress and intraocular pressureWe now know that intraocular pressure does respond to events in our lives, to our state of mind and emotions and to stress. However, before FitEyes came along in 2006 (and for several years afterwards) these facts were not recognized.

See this FitEyes article from Feb 2007:


The standard medical opinion is that stress does not affect eye pressure (intraocular pressure). For example, see "Glaucoma - Frequently Asked Questions" at The Eye Institute states:

"As far as we know, stress does not affect eye pressure or the health of the optic nerve."

Another example of the prevailing medical opinion can be found in a Wills Glaucoma chat transcript on Stress and Glaucoma from July 20, 2005:

Patient:  Does being nervous or stressed increase the IOP (intraocular pressure) as it does blood pressure?

Dr. Elliot Werner:  Not as far as we know.

Even today many ophthalmologists will deny that stress affects intraocular pressure. They will further deny that non-stressful events such as Bailey described could affect eye pressure.

How emotions affect eye pressure--Excitement

Submitted by dave on Fri, 05/07/2010 - 10:41pm

Excitement of winningI learned about emotions and eye pressure, in part, by watching my favorite sports and measuring my eye pressure over a period of years. See Watching Tour de France Raises IOP

Here is what I discovered after monitoring my eye pressure before, during and after watching sports over a period of several years.

  • If you watch a sports event that you don't care about at all, it has almost no effect on your eye pressure.
  • If you watch a sports event where your ego is caught up in the outcome of the event (i.e., you are attached to an outcome, such as your team should win) the excitement will raise your IOP.
  • If you watch a sports event where you appreciate the action, enjoy the skill of the participants, etc. and are not attached to the outcome, your intraocular pressure will be largely unaffected.


I need some way of measuring my nocturnal eye pressure

Submitted by Anonymous (not verified) on Wed, 05/05/2010 - 8:45am

measuring eye pressure while sleepingI need some way of measuring my nocturnal pressures. My daytime measurements are reasonably low most of the time, and relatively consistent. I want to start adjusting my medications (formulations, frequency, timing), but don't feel confident in doing this until I can take night time measurements.

I know this is a concern for just about everyone who has glaucoma. I'm surprised there isn't more discussion on FitEyes about how to take night time measurements, and how to interpret the data (I'm pretty sure I've read all that's there).

seeking explanation for my high eye pressure

Submitted by fitayes on Tue, 05/04/2010 - 1:20pm

hi my names robert, im from the uk, im 27 years old and have lived with ocd since i was about 14 years old.  For some months i had been dealing with chronic hyperventilation  which stressed me badly to the point where i felt that i could have had a break down due to the stress and took medication such as prozac, diazepam (only when i needed it) and went to a physiotherapist to help get my breathing back to normal.

List of all the things that affect eye pressure

Submitted by dave on Fri, 04/23/2010 - 12:30am

I'd like to ask everyone with a tonometer and good eye pressure data to contribute comments to this post. What factors have we identified that affect eye pressure? I'm going to start the list informally with things that come off the top of my head. I'll revise and refine this list based on feedback from people with tonometers and good data. Thank you!

Reduces Eye Pressure

Are handheld or portable tonometers appropriate for home eye pressure monitoring?

Submitted by dave on Thu, 04/22/2010 - 12:29pm

In any tonometer (based on today's technology), you can have some, but not all of, the following:

  • ease of use
  • accuracy (reliability and validity of data)
  • low cost
  • portability

handheld portable tonometerPeople tend to give a priority to portability and low cost. New products aimed at this feature set have recently been announced. Does it make sense to utilize those devices for self-tonometry?

We have to agree that any trade off that doesn't include reliability and validity of IOP data invalidates the whole endeavor of self-tonometry. Not only is it meaningless to do it if the data is not of sufficient quality upon which to make important decisions, but it could actually be detrimental to do self-tonometry in that case.

With today's technologies, portability entails user-alignment (in the context of self-tonometry). Proper user-alignment to produce a valid measurement, by definition, depends upon user skill as well as various specific conditions of each measurement. User-alignment, regardless of the tonometer, is difficult! (User-alignment is defined as the operator of the tonometer having to align the tonometer with the eye manually. Alignment is a very precise process requiring a steady hand, good eyesight, training and practice.)

Therefore, the requirement of user-alignment conflicts with the requirement of reliability and validity of IOP data. We cannot guarantee reliability and validity of IOP data when variable user skills are required to produce that data.

If any decent ophthalmologist or scientist (or intelligent thinker) considers a set of IOP data, they must consider how the data was obtained. If patient skill played a critical role in producing that data, as it does when user-alignment is required, the clear thinking person will immediately discount that data. Therefore, the self-tonometrist's efforts may not produce much of value.


Subscribe to FitEyes.com RSS Feed Subscribe to Eye Pressure