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Factors That Define Fit Eyes

Submitted by dave on Sun, 12/31/2006 - 2:31pm

Here are some of the factors that define fit eyes:

Dynamic Visual Acuity
This is the ability to clearly see objects while you and the objects are moving fast.

Visual Concentration
Visual Concentration is the ability to screen out distractions and stay focused on the competition.

Jeremy McGrath's Advantage?

Submitted by dave on Sun, 12/31/2006 - 10:39am

How many of you remember watching Jeremy McGrath dominate Supercross? One thing that struck me about Jeremy was that he seemed to always know what was happening everywhere on the track. I remember some people commenting that he seemed to have eyes in the back of his head. However, to me, it seemed like he had a super wide field of vision and very quick vision. He was aware of events (crashes, misplaced hay bails, etc.) well ahead of his position on the track.

Quick Summary of My Eye Pressure Over The Last 9 Days

Submitted by dave on Tue, 12/26/2006 - 9:48pm

The combination of diligent stress management along with using Xalatan and timolol maleate (0.25%) without waiting between eye drops has produced very good results over the last nine days. I will comment on the details in other posts, but in this post I want to show the overall daily eye pressure averages for the last nine days because this is the best period on record so far.

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A glutathione deficiency in open-angle glaucoma and the approaches to its correction

Submitted by dave on Sat, 12/23/2006 - 4:01pm

The findings point to a reduction of the processes of antioxidant defense of ocular tissues, developing as early as in the first stage of open-angle glaucoma. Lipoic acid administration for 2 months was associated with a rise of glutathione level in the red cells of patients with Stages II and III open-angle glaucoma.

The article is from the journal Vestn Oftalmol. 1992 Jul-Dec;108(4-6):13-5. [Article in Russian]

My 2nd Year Visual Field Results

Submitted by dave on Tue, 12/19/2006 - 2:03pm

These are my two-year follow up visual field test results. The prior Humphrey Visual Field tests were done on 02-Jan-2006. The first Humphrey tests were done on September 8, 2004. (These tests have all been done with the "old style" Humphrey instruments -- but they have not all used the same testing program.)

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Postural Changes and Eye Pressure

Submitted by dave on Sat, 12/16/2006 - 6:06pm

I found this data interesting. It hints that I sometimes have eye pressure changes related to postural changes. In the chart below, you'll see that my eye pressure went from 17 to 23 to 17 very quickly after I went from lying down to standing (and then sitting).

How Accurate Are My Eye Pressure Measurements?

Submitted by dave on Sat, 12/16/2006 - 12:45am

Working with my medical team, I have recorded tens of thousands of eye pressure measurements with a variety of tonometers under a variety of conditions. This blog post describes a recent comparison we performed between the Reichert AT555 (a non-contact tonometer or NCT) we use for most eye pressure measurements and Goldman applanation tonometry (GAT) performed by one of the doctors on my medical team. I believe our data indicates that the Reichert AT555 tonometer does an excellent job.

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Paradoxical Effects of Relaxation Techniques Elevating Eye Pressure

Submitted by dave on Fri, 12/15/2006 - 4:14pm

NOTE: This post was made in late 2006. The comments following it were made in early 2007. In the time that has passed since these initial intraocular pressure observations were made (see comments below), we have come to understand this situation much, much better. This thread is interesting for background information, but please see the more recent posts on if you want to really understand the relationship between stress, breathing, meditation and eye pressure. I have been in contact with a number of people who have tonometers and who have replicated some of these observations, and the patterns continue to hold. Basically, this seems to apply to all glaucoma patients. However, there are individual differences, especially among meditators and non-meditators.

This abstract simply triggers a discussion in the comments below. All the interesting info is in the comments.

The Pulsair-Keeler non-contact tonometer in self-tonometry: preliminary results.

Submitted by dave on Fri, 12/15/2006 - 4:06pm

EDITOR: this is a very old study. The tonometer discussed here (the original Keeler Pulsair) is no longer manufactured. The current Keeler Pulsair models do not work for self-tonometry due to design changes.

Comparison of the effects of latanoprost, travoprost, and bimatoprost on circadian intraocular pressure in patients with glaucom

Submitted by dave on Fri, 12/15/2006 - 3:52pm

PURPOSE: To compare 24-hour reduction in intraocular pressure (IOP) by latanoprost 0.005%, travoprost 0.004%, and bimatoprost 0.03% in patients with primary open-angle glaucoma (POAG) or ocular hypertension (OH).

DESIGN: Randomized, double-masked, crossover study.

PARTICIPANTS: Twenty-four patients with POAG and 20 with OH.


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