How far away could you stand from a 12.5X11 paper with 12tp font before you had to strain to be able to read it?

 The distance at which you can comfortably read a 12.5 x 11 inch paper with 12pt font depends on your visual acuity, which is usually measured as a fraction like 20/20. 20/20 vision is considered normal vision, where you can see a standard optometrist's eye chart from 20 feet away.

For someone with 20/20 vision, the minimum comfortable reading distance is generally considered to be around 16 inches (40 cm). This is based on the idea that at this distance, the letters on the page subtend a visual angle of about 5 minutes of arc, which is the smallest detail most people can comfortably resolve.

However, this is just a general guideline, and your actual reading distance may vary depending on several factors, including:

• Lighting: Reading in bright light will allow you to see the letters more easily, so you may be able to stand further away.
• Contrast: The contrast between the letters and the background will also affect readability. Black letters on a white background are easier to read than, for example, gray letters on a blue background.
• Font type: Some fonts are easier to read than others. Sans-serif fonts, such as Arial or Helvetica, are generally considered to be more readable than serif fonts, such as Times New Roman.
• Age: As you get older, your eyes become less flexible, which can make it harder to focus on close objects. This means that you may need to stand closer to the paper to read it comfortably.

If you have any concerns about your vision, it's always a good idea to see an eye doctor for a checkup. They can measure your visual acuity and make sure that you don't have any underlying eye conditions that are affecting your ability to read.

Here are some additional tips for reading comfortably:

• Take breaks every 20-30 minutes to give your eyes a rest.
• Adjust the lighting to make sure it's bright enough to see the letters clearly.
• Tilt the paper slightly so that the light reflects off the surface and makes the letters easier to see.
• Use a reading stand or book holder to keep the paper at a comfortable angle.

By following these tips, you can help to ensure that you can read comfortably for long periods of time.