This question was asked in 2012. Browsers in 2020 now support a much wider range of Unicode characters. These three Unicode characters all render in my browser (Ubuntu 19.10, latest FF and Chrome):
- Right-Pointing Magnifying Glass (
🔎
): 🔎
- Left-Pointing Magnifying Glass: (
🔍
): 🔍
- Eye (
👁
): 👁
I ran a browser compatibility test with popular browsers (and a 2nd) to render this answer:
- Windows 10, Firefox 77: Works
- Windows 10, Edge 18: Works
- Windows 8.1, Firefox 71: Works
- Windows 8.1, Internet Explorer 8.1: Magnifying glasses work, eye does not
- Windows 7, Internet Explorer 10: Magnifying glasses work, eye does not
- Windows 7, Chrome 81: Magnifying glasses work, eye does not
- Windows 7, Internet Explorer 9: Nothing works
- Windows 7, Chrome 70: Magnifying glasses work, eye does not
- Mac 10.14, Safari 12: Works
- Ipad Pro 11, Safari 11: Works
- Iphone X 11, Safari 11: Works
- Windows 10, Opera 63: Works
- Mac 10.14, Opera 64: Works
- Android 10.0, Chrome 79: Works
- Android 5.0, Chrome 61: Magnifying glasses work, eye does not
The maginfying glasses work fine everywhere except very old Windows and IE.
The eye works on all modern browsers but not pre-Windows-10 or older Android phones.