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What is The magnification obtained by direct ophthalmoscope is and explain in detail?
TECHNIQUE MAGNIFICATION FIELD OF VIEW CHARACTERISTICS Direct ophthalmoscopy 15X 5* Erect and viual Indirect ophthalmoscopy with +20D 3X 45* Inveed reversed and real Indirect ophthalmoscopy with +30D 2X 50* Inveed reversed and real Biomicroscopic examination with +78D 10X 30* Inveed reversed and real Biomicroscopic examination with +90D 7.5X 40* Inveed reversed and real Fundus camera 2.5X 30* Erect, viual, photo documentation Ref. : Khurana's Theory and Practice of Optics and Refraction; 2nd Ed; Pg. 386