Difficulty focusing eyes

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Difficulty focusing eyes

Postby submassabielle » Aug 2, 2012 8:45 am

I recently went on my first survey trip. I found that I was slowed down by having a hard time focusing when I looked into the compass and clinometer. When I would first look in, it was crystal clear. Then after a few seconds, my eyes would bug out and I couldn't even make out the numbers. If I looked away at a distant object and then looked back again, I could again see clearly (but that took a second also b/c of the dark). I really felt it slowed me down. Has anyone else had this problem? Do I need to see an optometrist? Am I doing something wrong? The only other trouble I have ever had focusing is on headlights late at night and blue LED Christmas lights. Thanks in advance.
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Re: Difficulty focusing eyes

Postby Scott McCrea » Aug 2, 2012 8:51 am

Were you closing one eye? You should close the eye you're not reading with. Read and sight with the same eye.
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Re: Difficulty focusing eyes

Postby Carl Amundson » Aug 2, 2012 10:11 am

Scott McCrea wrote:Were you closing one eye? You should close the eye you're not reading with. Read and sight with the same eye.

I like to keep both eyes open when I'm reading instruments. It allows me to look at the numbers and survey station that's lit up.
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Re: Difficulty focusing eyes

Postby submassabielle » Aug 2, 2012 10:21 am

junkman wrote:
Scott McCrea wrote:Were you closing one eye? You should close the eye you're not reading with. Read and sight with the same eye.

I like to keep both eyes open when I'm reading instruments. It allows me to look at the numbers and survey station that's lit up.


I was closing one eye. I am pretty sure I am right eye dominant, but I was still worried that if I opened both eyes the location of the black line might be distorted. It was also complicated because there were formations everywhere and felt a bit contorted, with the result that the more I looked, the harder it was to stay steady (which forced me to look even more). I am hoping that more experience might help (e.g. getting a feel for which direction is positive and which is negative on the instruments), so that I can get the sighting before my eyes go blurry.
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Re: Difficulty focusing eyes

Postby Chads93GT » Aug 2, 2012 11:35 am

Take the instruments home and practice. ITs very hard at first for beginners, Its really a lot like looking through a high powered scope of a rifle. Keep at it and dont get frustrated. Its a new exercise for your eyes, and they arent used to it yet, and neither is your brain. practice.
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Re: Difficulty focusing eyes

Postby Scott McCrea » Aug 2, 2012 12:22 pm

The one eye vs two was previously discussed with lots of great info: LINK
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Re: Difficulty focusing eyes

Postby GroundquestMSA » Aug 2, 2012 12:38 pm

The eyepiece on Suunto instruments can also be focused a bit by turning. That may help. It's been difficult for me to read instruments that are adjusted for another persons eyes.
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