best computer software for sight impaired

Of course, if the screen resolution stays the same, everything is bigger on a bigger screen. What used to fill the screen now occupies only 3.7% of it. A 3840 x 2160 (4K) screen can display 4.5 rows of six 640 x 480 images. A 1920 x 1080 pixel Full HD screen can display two rows of three 640 x 480 images. The same thing happened each time screen resolutions increased. Now you could fit two of your 640 x 480 pixel images on screen side by side with room to spare, but again, each image was smaller. The result was W-XGA (Wide Extended Graphics Array). Manufacturers simply retained the depth from XGA (768 pixels) and extended the width to fill a flat panel with an aspect ratio of 16:9, which was efficient for manufacturing.

Windows laptops moved on to widescreens with a resolution of 1366 x 768 pixels, which sounds odd but isn’t. Now your 640 x 480 photo no longer filled the screen and if the screen was the same size, it would be smaller.

Screens kept improving and the next major standard was XGA (Extended Graphics Array), with a resolution of 1024 x 768 pixels and the same 4:3 aspect ratio, like a TV set. VGA was a major advance in 1987, and some feature phones and laptops still have cameras with VGA resolution. Go back a few years and most of us were using PCs with VGA (Video Graphics Array) screens, which had a resolution of 640 x 480 pixels.

Both screen sizes and resolution started small, growing over the years as display and graphics technology improved.

Best computer software for sight impaired