1. Field of the Invention
The present invention relates to a visual acuity testing apparatus, more particularly, the present invention pertains to a visual acuity testing apparatus of a subjective type used for inspecting visual acuity.
2. Related Art Statement
In conventional subjective type visual acuity testing apparatuses, it is required to lengthen the distance between an eye to be tested and an apparatus for inspecting visual acuity in order to eliminate an influence due to the ability of accommodation of the eye and therefore, these apparatuses have been constructed so that a visual acuity table is placed at 6 meters distant from the eye to carry out the inspection of visual acuity.
For that reason, a quite wide space for carrying out the visual acuity inspection should be secured when using such a conventional subjective visual acuity testing apparatus. However, it is particularly difficult for opticians and ophthalmologists to secure or maintain such wide space since, in general, the floor area thereof is very small and limited.
Moreover, in the conventional subjective visual acuity testing apparatuses, a support arm is vertically disposed on and fixed to the top of a table to support a unit for inspecting visual acuity at an upper portion of the support arm.
When such a subjective visual acuity testing apparatus is used to inspect eyes, it is also necessary to secure a space to be occupied by a consultant other than the space for eye examination.
However, it is quite difficult for opticians and ophthalmologists, the floor areas of which are quite small, to secure both areas for carrying out eye examination and consultation.