| 0 |
0 On most occasions, I can stand as long as necessary without experiencing any blurry vision |
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0 On most occasions, I can stand as long as necessary without experiencing any blurry vision |
| 1 |
1 On most occasions, I can stand more than 15 minutes before experiencing blurry vision |
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1 On most occasions, I can stand more than 15 minutes before experiencing blurry vision |
| 2 |
2 On most occasions, I can stand 5-14 minutes before experiencing blurry vision |
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2 On most occasions, I can stand 5-14 minutes before experiencing blurry vision |
| 3 |
3 On most occasions, I can stand 1-4 minutes before experiencing blurry vision |
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3 On most occasions, I can stand 1-4 minutes before experiencing blurry vision |
| 4 |
4 On most occasions, I can stand less than 1 minute before experiencing blurry vision |
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4 On most occasions, I can stand less than 1 minute before experiencing blurry vision |