Differences in visual acuity measurements obtained with different types of targets.

About individual differences in vision

“…For impaired vision this is not true. For example, visual acuity tests strongly correlate with each other, when the entire range of acuity values is taken into account (Kurtenbach, Langrová, Messias, Zrenner, & Jägle, 2013;McKee, Levi, & Movshon, 2003;Rabideau, 1955), which is not surprising since, for example, a nearly blind person reaches floor performance in all tests. However, acuity tests do not strongly correlate when restricted to the majority of well sighted people (Cappe et al, 2014).…”

“…In addition, primary visual cortex size correlated negatively with the illusion magnitude in the Ebbinghaus, Ponzo and tilt illusions Song, Schwarzkopf, & Rees, 2013). Surprisingly, studies investigating basic visual paradigms, such as Vernier acuity or Gabor detection, found only weak or nonsignificant correlations between different paradigms (Bosten & Mollon, 2010;Cappe, Clarke, Mohr, & Herzog, 2014;Peterzell, Werner, & Kaplan, 1995;, but see Rabideau, 1955). Peterzell and Teller (1996) found that contrast sensitivity for gratings with frequencies lower than 1 cycle/degree are strongly correlated with each other.…”

“…Surprisingly, there is very little evidence for a common factor in vision as mentioned in the introduction (Bosten & Mollon, 2010;Cappe et al, 2014; but see Rabideau, 1955).…”

A factorial study of dexterity tests.

“…Factor Zachert (1951) reported the two acuity tests as having high loadings on a factor labeled "Acuity," but included the Orthorater Depth Perception Test in her results as a specific factor having no significant loading on Acuity. Rabideau (1955) It might be suggested that this factor could involve a grasping ability. This implies that holding the tweezers involves a kind of "controlled grasping"-a lack of fumbling.…”

Uso do teste Lea Gratings para avaliação da acuidade visual de resolução de grades em lactentes normais

“…O estímulo abrange uma área muito maior do campo visual do que aquela abrangida pelo optotipo, sendo a detecção da presença de um padrão de listras uma função cerebral diferente da discriminação de formas (107). Mayer e Dobson (42) encontraram diferenças entre os valores de acuidade visual de reconhecimento e de resolução em sujeitos com cinco anos de idade, testados pelo Procedimento de Olhar Preferencial Operante, dados que corroboram com estudos anteriores que mostraram que a correlação entre a acuidade de reconhecimento e a acuidade de resolução é relativamente fraca (123,124) . Dessa forma, os valores da acuidade de grades não devem ser convertidos em valores de acuidade de optotipos (125) .…”