What is the power of a contact lens worn by a farsighted person whose near point...
The contact lens prescription for a mildly farsighted person is 0.75 D, and the person has a near point of 29.0 cm. Randomized Variables Pe = 0.75D What is the power in D of the tear layer between the cornea and the lens if the correction is ideal, taking the tear layer into account? Assume that a normal human has a near point of 25.0 cm.
What power lens is needed to correct for the farsightedness of a person whose near point is 58.0 cm? (Assume that eye-lens distance is negligible and the normal near point of the eye is 25.0 cm). Answer in diopters please.
Calculate the near point of a farsighted person if she was prescribed a corrective lens of power +2.00 diopters. Calculate the far point of a nearsighted person if she was prescribed a corrective lens power of -1.5 diopters.
A farsighted boy has a near point at 0.5m and requires contact lenses to correct his vision to the normal near point. What is the correct choice of lens power for the contact lenses? The answer is +6.0 diopters but I keep getting 2 so I'm not sure what I am doing wrong.
A farsighted person has a near point of 100cm. A corrective lens needs to create a virtual image at this distance if an object is placed at 25 cm. a. What power (in diopters) lens is needed? b. What type of lens is this? (diverging or converging)
A farsighted person has a near point of 75 cm rather the normal 25 cm. What strength lens, in diopters, should be prescribed to correct this vision problem? Object , o = 25cm, image, i= -75cm(negative, in front of lens) Martin is severe myopia, with a far point of 15cm. he wants to get a glass that he ‘ll wear while using his computer, whose screen is 75cm away. What refractive power will these glasses required? Object, o=75 cm, image,...
(A) What power contact lens in D is needed to correct the vision of a person who has a near point of 64.0 cm and allow him to see objects 25.0 cm away? __________ D (B) If this person has a normal 8.00% ability to accommodate (increase) the power of his eyes, what is the maximum distance of objects he can see clearly in m with his contact lenses and with totally relaxed eyes? (Assume a lens-to-retina distance of 2.00...
For a normal eye, the near point is 25.0 cm. This is where you would like to place the printed material such as the newspaper to read. The far point is very far away. What type and focal length corrective contact lens should a nearsighted person whose far point is 80.0 cm wear? What is the power of this lens? What type and focal length corrective contact lens should a farsighted person wear if the persons near point is 60.0...
What is the power of a contact lens for a nearsighted whose far point is 1.50m? Answer: D
A near-sighted person has a far point of 80 cm. A) What kind of corrective lens the person will need if the lens is to be placed 1.5 cm from the eye? The answer is not 78.5, 80 or -1.27 B) What would be the power of the contact lens needed? Assume distance to contact lens from the eye to be zero.