Your patient was able to read the 20/200 line before refraction. After refraction, she was able to reach 20/125 with her new prescription. She desires to read print with 20/50 or 1M size using a hand magnifier. What is the required dioptric power?

(a)  

What is the predicted add if the patient's best corrected distance acuity is 20/63 and the goal near visual acuity at near is 20/28? Use Lebenson's method considering the patient has requested for a spectacle magnifier.

(a)  

What is the predicted add if the patient's goal near visual acuity is 20/30? His best corrected distance is 20/140. Use Kestenbaum's method considering the patient has requested for a hand magnifier.

(a)  

Your patient was able to read 20/400 line before refraction. With the new prescription after refraction, he was able to reach 20/180. He wants to use spectacle magnifiers to read documents in the office whose size is 20/30. Use Lebenson's method to determine predicted add.

(a)  

A patient achieves 7M visual acuity at a distance of 25 cm. She wants to read prints as small as 4M at 40 cm. How much magnification is needed?

(a)  

A patient achieves 14M visual acuity at a distance 30 cm. He wants to read prints as small as 6M at 40 cm. What amount of lens will allow him to achieve his goal?

(a)  

A patient reads 10M print. What microscopic glass would be required to allow him to read 2M print at a distance of 40cm?

(a)  

The signage is 120 cm away from Annie. The signage was moved closer to her at 50 cm. How much magnification is created?

(a)  

Anthony uses the electronic device to read notes whose size is 7 cm. The size of letters projected at the electronic device is 30 cm. How much is the projection magnification created by the electronic device?

(a)