无论是年龄增长还是其他影响视力的疾病，我们都需要调整电脑或硬件设置，使阅读再次变得轻松愉快。但最好的行动方案是什么呢？今天的超级用户问答帖子为需要帮助的读者提供了一些建议。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

图片由Peter Kemmer（Flickr）提供。

问题

超级用户读者Shanman正在寻找处理电脑屏幕可读性问题的建议：

I have a 19″ monitor with a native resolution of 1600*900 pixels. This provides crisp clear text, but it is too **all and my vision is not as good as it once was.

In order to see better, I have reduced the resolution to 1280*720 pixels and chosen large fonts. The text is larger but not as clear. It forces me to scroll horizontally because part of the text no longer fits onto the screen.

If I upgraded to a 23″ monitor with a native resolution of 1920*1080 pixels and chose a normal sized font, would that fix my woes? How would the text size on my 19″ monitor set at 1280*720 pixels with large fonts compare to the text size on a 23″ monitor set at 1920*1080 pixels with a normal sized font?

Shanman的最佳行动方案是什么？

答案

超级用户贡献者fixer1234、Mark Plotnick和STTR为我们提供了一些答案和建议。首先，fixer1234：

Some Quick Background

Pixels are the **allest physical “dots” that are lit up on the monitor to display an image. They are the building blocks and define all of the trade-offs. The monitor is manufactured with a specific arrangement of pixels, which is its native resolution.

Characters are drawn on the screen by defining which pixels are illuminated within an imaginary grid. The number of pixels in the grid determines the size of the font on that monitor.

Normal Size

We can start with screen fonts at their normal size and the computer configured to use the monitor’s native resolution, then compare how the same font will look on two differently sized monitors. On each monitor, the actual size of the font on the screen will be determined by the physical size of the screen’s pixels.

The density or closeness of the pixels at which the screen is manufactured is measured in pixels per inch. That determines the physical size of each pixel. A 19″ monitor with a native resolution of 1600*900 pixels and a 23″ monitor with a native resolution of 1920*1080 pixels both have roughly 96 pixels per inch. So, if these two screens were compared side-by-side, the font would be the same size on both displays.

Magnification

If you want to select a larger font or set the computer to magnify the font, either option reduces how much will fit on the screen. The larger screen will give you more screen real estate (more pixels to work with). So, the larger, higher resolution monitor will allow you to display more content on the screen.

If you set the computer to a lower resolution and magnify it to fill the screen, it maps the content of the **aller image onto the larger space and interpolates to determine what each physical pixel displays. Mapping a 1280*720 pixel resolution onto a 1600*900 display is equivalent to a magnification of 125 percent.

If you wanted that same magnification on a 1920*1080 display, you would select a resolution of 1536*864 pixels (or whatever was the closest standard resolution available) to map full screen. That figure is nearly the same as the native resolution of your current monitor. If you selected a slightly higher resolution, you would get a slightly lower magnification.

So with the larger monitor, you could come close to displaying the content of your current monitor’s native resolution at the magnification you like.

第二个答案来自fixer1234：

Computer glasses can make a huge difference relative to multi-focal or progressive lenses. Your entire field of view is accurately corrected to the screen’s distance. I use them now and it makes a world of difference.

接着是马克·普洛特尼克的回答：

If your problem is simply Pre**yopia, then either good, non-distorting reading glasses or a similar change to whatever other vision correction you are using (i.e. bifocal or monovision glasses) can help.

STTR的最终答案是：

You can learn more about optimizing the display scaling on your screen here:

Optimize Display Scaling and Fix Scaling Issues on Windows 7 (Microsoft TechNet)

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