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).

Continuous Positive Airway Pressure Therapy Is Associated with an Increase in Intraocular Pressure in Obstructive Sleep Apnea

Submitted by dave on Thu, 04/22/2010 - 9:41am

PURPOSE. Several reports have demonstrated an association between glaucoma and obstructive sleep apnea (OSA), though the origin of this association remains unknown. In the present study, the influence of OSA and continuous positive airway pressure (CPAP) therapy on intraocular pressure (IOP) and ocular perfusion pressure (OPP) was examined.

METHODS. IOP, blood pressure, and pulse rate were measured every 2 hours during 24-hour sessions in 21 patients with newly diagnosed OSA. A first series of measurements was performed before CPAP therapy, and a second series was performed 1 month after the initiation of CPAP therapy. OPP was then calculated.

Effect of Sleeping Posture on Intraocular Pressure

Submitted by dave on Sun, 04/04/2010 - 1:55pm

A research study presented as a "poster" at ARVO 2010 indicated that the position of one's head (and body) during sleep can have an effect on intraocular pressure. For example, your eye pressure may be lower if you sleep on your back compared to sleeping on your side. (Furthermore, in my own experience, sleeping on your stomach may be the worst for IOP.)

Not discussed in this particular study was any difference in intraocular pressure between eyes. There is some evidence that if you sleep on your left side, intraocular pressure in the left eye could be higher.

Effect of Sleeping in a Head-Up Position on Intraocular Pressure in Patients with Glaucoma

Submitted by dave on Wed, 03/03/2010 - 2:28pm

I am reading this study now. I like the fact that they did investigate ocular perfusion pressure (OPP) while monitoring the intraocular pressure (IOP) during this study, and that they checked IOP in the sleeping position (rather than sitting the patient up). So, with a quick glance, the methodology looks acceptable to me.

Purpose: To determine whether a 30-degree head-up sleeping position decreases nocturnal intraocular pressure (IOP) compared with lying flat in patients with glaucoma.

Calling All Side Sleepers

Submitted by walk6981 on Tue, 01/05/2010 - 10:14pm

For those of you who have been life-long side sleepers:  is your glaucoma and hearing (for those of you who suffer from tinnitus or are hard-of-hearing in one ear) worse on the side on which you sleep?

By the same token, for those of you who sleep on your backs; is there a large or small IOP differential between your eyes?

Nothing scientific about this query; just simple curiosity.


Sleeping position alters intraocular pressure

Submitted by dave on Wed, 12/30/2009 - 5:45pm

How we sleep can raise or lower IOP

Patients with glaucoma often ask what they can do to favorably impact their disease. These patients are eager to engage in beneficial activities and to avoid detrimental activities to save their optic nerve from glaucoma. Unfortunately, most of glaucoma’s known risk factors are not modifiable—such as age, race, and family history. In glaucoma management, there is little credible data supporting any role of nutritional supplements, avoidance of certain exposures such as caffeine or smoking, or alternative interventions such as acupuncture. Doctors’ standard answer is usually to encourage patients to continue using their medications as prescribed and to keep their follow-up appointments faithfully.
Some new research presented at the May 2009 annual meeting of the Association for Research in Vision and Ophthalmology, Ft. Lauderdale, Fla., suggests that there may be a new modifiable risk factor within the patient’s ability to control: sleeping position.

Read more:

Caveat: this article ignores ocular perfusion pressure. It is quite possible that the conclusions discussed in this article are incorrect. Sleeping with the head elevated may reduce IOP but it may also reduce blood flow to the optic nerve (and brain) and thereby reduce ocular perfusion pressure. It is quite possible that sleeping with the head elevated may do a glaucoma patient more harm than good. But read the article for one perspective.

Glaucoma Specialist Visit: Eye Pressure and Lying down

Submitted by tsingle999 on Wed, 06/25/2008 - 10:38pm

This is my first blog post and i've never done this before but i thought i would start with what is going on now;

Today i met with my glaucoma specialist and told him a few of the things that have been going on.

1) The Atlas Orthogonal adjustment that eliminated my exercise induced visual field reduction in my right eye. (my right eye has suffered the most nerve damage)

My Personal Self-Tonometry Setup

Submitted by dave on Sun, 06/01/2008 - 12:54pm

Someone recently asked me where I keep my tonometer. When I started self-tonometry, I kept my tonometer in my office in a convenient location so that I could check my intraocular pressure while working without getting up from my desk. I could check my IOP while talking on the phone or using the computer, for example. At that time stress was one of my main research focuses and work was my main source of stress. Eventually, I achieved excellent management of my intraocular pressure during the work day and I began looking at my diurnal IOP curve more closely.

Re: optic nerve death

Submitted by dave on Mon, 05/26/2008 - 1:26pm


When I have asthma attacks the ER admits me if [my oximetry readings] dip below 85 at all. I do go under 90% which could be one of times when the hemoglobin is unable to furnish plenty of oxygen. Maybe better management of my asthma would help.


I have taken an interest in monitoring oximetry while doing other IOP research, including while doing pranayama, Serene Impulse and many of the other techniques I'm testing. I don't have anything extremely interesting to report yet, however. UPDATE: see Eye Pressure Miracle.


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