Basic assessment of Light, Motion, & other perceptual thresholds
Assessing visual perception for very low acuity (below hand motion etc.) is not covered by the usual acuity tests. Thus I developed this test for Retinal Implant. They kindly made it free for general use in 2019. The test and clinical results are described here: Bach M, Wilke M, Wilhelm B, Zrenner E, Wilke R (2010) Basic quantitative assessment of visual performance in patients with very low vision. Invest Ophthalmol Vis Sci 51:1255–1260 [PDF]
Download options
Windows stand-alone application BaLM3.2.exe.zip. On current Windows versions you will see a dialog “… unknown publisher…”: this message is normal, allow it, explanation). With the latest Windows, you need to: right click, open, and allow.
MacOS stand-alone application BaLM3.2.app.zip. Since MacOS 10.9: Must right click, open and confirm. I know of two cases where download stopped in mid-stream, consequently “decompression failed”. Reasons unknown. If retry does not help, contact me and we’ll find a work-around.
These downloadable versions do not need Flash to be installed on your computer.
On-line demo
If you have Flash enabled in your browser, you can try out the on-line version below.
