Suitable for: People with cataracts, glaucoma, optic nerve atrophy, retinal disease, high myopia, congenital cataracts, nystagmus, albinism, and elderly men with low vision. A helpful tool for people with low vision: The elderly are a high-risk group for low vision, as their eyesight gradually deteriorates with age. Easy to Use: Even those with limited technical knowledge can easily use it! Simply hover the mouse over the text you want to read, and the text be magnified on your TV or monitor. Three display modes: black text on white background, white text on black background, and full-color display. Electronic Mouse Magnifier: This electronic vision aid connects to a TV and supports a screen freeze function. Magnification: 1-4 times the magnification of the reading aid. The actual magnification depends on the TV or monitor. For example, if the TV screen size is 20 inches, the magnification is 20-80 times. Therefore, the larger the TV screen, the greater the magnification.