| 摘要 |
A portable dark flexible tunnel (14) for viewing transparencies, medical radiographs, mammograms and other transilluminated materials. Its proper use provokes human physiologic darkness adaptation more effectively by using an elastic flexible cylinder (12) with a conformable distal aperture which can be manually shaped to fit the form of the areas of viewing interest while excluding nearby blinding light. Additional elements to exclude stray light include a soft, form-fitting goggle on the proximal end to contact the face around the eyes. An intermediate lens board (16) is included for easy change of binocular or monocular magnifier lens (2).
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