dioptometer |
| noun
- An instrument used to measure ocular refraction, in order to prescribe corrective lenses
| | diplopia |
| noun
- (pathology) An ophthalmology , ophthalmologic condition where one perceives two images; double vision.
| divergence |
| noun (wikipedia, divergence, divergence (operator))
- The degree to which two or more things diverge.
- (mathematics) the operator which maps a function F=(F1, ... Fn) from a n-dimensional vector space to itself to the number <math>\sum_{i=1}^n \frac{\partial F_i}{\partial x_i}</math>
| double vision |
| noun
- a disorder of vision, (diplopia), in which a single object is seen as two
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