Close up view of cheerful middle aged man in eyeglasses looking at camera isolated on grey - Banco de fotos e imagens

A man in glasses works late at night. He looks worried, he sees on the computer screen in front of him, a close-up 4k

The programmer's glasses reflect lines of code. Programming, development of applications, sites and other things. Software development concept

Cheng Yixiao, founder of Chinese video sharing and live-streaming app Kuaishou, attends the 2018 China Entrepreneur Summit in Beijing, China, 2 December 2018.

Portrait of tired student girl closing eyes in glasses in black studio. Concentrated young businesswoman working in front of screen. Exhausted female worker winking eyes indoors.

Closeup of serious focused handsome man in glasses looking at screen.