一般來說兩個分離的點要被人眼分辨出來，必須至少有0.3分的間距。01的鄉民據說神通廣大，應該可以很容易算出相當於在一般手機使用距離下的解析度。
如果還是不行的話，我隨便找了個網站
http://www.clarkvision.com/articles/eye-resolution.html
作者是個天文學家/科學攝影專家
裡面有一段話
How many pixels are needed to match the resolution of the human eye? Each pixel must appear no larger than 0.3 arc-minute. Consider a 20 x 13.3-inch print viewed at 20 inches. The Print subtends an angle of 53 x 35.3 degrees, thus requiring 53*60/.3 = 10600 x 35*60/.3 = 7000 pixels, for a total of ~74 megapixels to show detail at the limits of human visual acuity.
The 10600 pixels over 20 inches corresponds to 530 pixels per inch, which would indeed appear very sharp. Note in a recent printer test I showed a 600 ppi print had more detail than a 300 ppi print on an HP1220C printer (1200x2400 print dots). I've conducted some blind tests where a viewer had to sort 4 photos (150, 300, 600 and 600 ppi prints). The two 600 ppi were printed at 1200x1200 and 1200x2400 dpi. So far all have gotten the correct order of highest to lowest ppi (includes people up to age 50). See: http://www.clarkvision.com/articles/printer-ppi
意思是說0.3分的角度相當於在20英寸(~50公分)的距離上約530 ppi的解析度。作者也實際做過行為測試，發現受測者可以正確分辨出140, 300 與 600 ppi解析度的圖片。
所以請不要被蘋果洗腦了，300 ppi這種解析度還遠低於人眼分辨能力，我們的眼睛沒有那麼差。HTC超過四百的解析度還未達到人眼的極限。
至於手機螢幕需不需要那麼高的解析度，這就看人的需求了。我的手機解析度只有兩百多但是我已經用的很高興。
我只是看不慣有很多人連求證都不求證就喊著超過300ppi人眼分辨不出來這種話。
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