The magnification obtained by direct ophthalmoscope is: (A) 5times, (B) 10times, (C) 15times, (D) 20times
Answer is C. 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