NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: "Vernier acuity" of horizon IC tests
From: Douglas Denny
Date: 2009 Jul 5, 15:31 -0700
From: Douglas Denny
Date: 2009 Jul 5, 15:31 -0700
With consideration of the last posting regarding retinal receptors and vernier acuity: I note the practical results of horizon index error measurement here by Mr. Rudzinski, and of the results in the paper by Gordon; and the results posted by others here, amount to around 0.4 minute of arc to one minute of arc. The cone diameter is about 0.4 minute of arc. 'Normal' visual acuity (depending on the target type) is between 0.4 and one minute of arc. Curious coincincidence, do you not think? Douglas Denny. Chichester. England. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
