The dot illusion

[TLG]

Ludimar Hermann documented this classic optical illusion in 1870, known as the Hermann grid illusion. As you scan the image, you will find faint black dots appearing between the squares, only to vanish when you try to focus on them

https://www.livemint.com/lm-img/img/2025/05/17/original/95d88ac1fc0a33ac12000ad2a84fbf87_1747460995936.jpg