<P> Example for high - def video on a 32 - inch 1080p HDTV: </P> <P> VD = 32 (1920 1080) 2 + 1 ⋅ 1080 ⋅ tan ⁡ 1 60 = 49.94 (\ displaystyle (\ textrm (VD)) = (\ frac (\ textrm (32)) ((\ sqrt (\ left ((\ frac (\ textrm (1920)) (\ textrm (1080))) \ right) ^ (2) + 1)) \ cdot (\ textrm (1080)) \ cdot \ tan (\ frac (1) (60)))) = 49.94) (inches) </P> <P> Sitting beyond these distances will result in a loss of detail . </P> <P> A 1998 Sun Microsystems paper on the limits of human vision and video display systems uses a different constraint value of approximately 1⁄2 an arc minute (or 30 arc seconds), when estimating the saturation point for the human visual system . With 30 arc seconds as the constraint, the view angle necessary to see all the detail provided by an HDTV with a 1080p resolution drops to approximately 16.1 degrees . Furthermore, several academic articles have challenged the notion that 1 arcminute of resolution is the typical resolving power of the human eye, suggesting that on average, we can resolve detail smaller than that . Also, there is the issue of vernier acuity, which is the eye's ability to detect an offset between 2 lines and stereoacuity, which is the ability to discriminate depth by the use of both eyes . Vernier acuity and stereoacuity are cited as being detected with only a 2--4 arc second degree of separation . Ultimately all of the various types of acuity play a part in how we see things and more importantly, how we perceive what we are witnessing . The complexities of the human visual system and the relationship between different types of acuity are not yet fully understood . Thus, depending on which human visual system constraints are applied, viewing angles calculations will vary to some degree, especially when technological constraints are factored in . </P>

What is ideal viewing distance from a tv