Trou­vez le pro­blème de vue as­so­cié à chaque dé­fi­ni­tion :

Vocable (Anglais) - - Practic'able -

1- Ina­bi­li­ty to see things clear­ly un­less they are re­la­ti­ve­ly close to the eyes. 2- Seeing ob­jects at a dis­tance clea­rer than those near at hand. 3- A re­frac­tive er­ror of the eye in which pa­ral­lel rays of light from an ex­ter­nal source do not converge on a single fo­cal point on the re­ti­na. 4- Ina­bi­li­ty to dis­tin­guish one or se­ve­ral co­lours.

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