Pattern page of Ishihara book using red filter - 4 of 21

Extensive study and observation on effect of filters on Ishihara test plates. Red filter was used to test the impact.
By the end of 21 videos you will get much information and updates on filters.

You can watch the series by clicking on the links below


Yellow filter pattern pages of Ishihara book Video no. 2 of 21 videos   • Видео  

Red filter number pages of Ishihara book Video no. 3 of 21 videos    • Видео  

Red filter pattern pages of Ishihara book Video no. 4 of 21
   • Pattern page of Ishihara book using r...  

Purple filter number pages of Ishihara book Video no. 5 of 21 videos
   • Видео  

Purple filter pattern pages of Ishihara book Video no. 6 of 21
   • Pattern pages with purple filter  6 o...  

Pink filter number pages of Ishihara book Video no. 7 of 21 videos
   • Pink Filter to read Ishihara test pla...  

Pink filter pattern pages of Ishihara book Video no. 8 of 21
   • Pattern pages of Ishihara book with P...  

Orange filter number pages of Ishihara book Video no. 9 of 21 videos
   • Видео  

Orange filter pattern pages of Ishihara book Video no. 10 of 21
   • Orange filter pattern pages in Ishiha...  

Grey filter number pages of Ishihara book Video no. 11 of 21 videos
   • Effect of Grey Filter on Ishihara tes...  

Grey filter pattern pages of Ishihara book Video no. 12 of 21
   • Grey filter to read Ishihara test pla...  

Green filter number pages of Ishihara book Video no. 13 of 21 videos
   • Impact of green filter on Ishihara te...  

Green filter pattern pages of Ishihara book Video no. 14 of 21
   • Видео  

Blue filter number pages of Ishihara book Video no. 15 of 21 videos
   • Impact of blue filter on  Ishihara te...