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Articles about the Retinal Acuity Meter RAM® :

When pre-operative acuity is better than 20/200, the following studies and abstracts conclude the following levels of correlation for predicting postoperative acuity prior to cataract surgery (predicts within 2 lines in 95% and within 1 line in 85% when preoperative acuity is better than 20/200) or YAG laser capsulotomy (predicts postoperative acuity to within 1 lines in 97% and within 2 lines in 100% of eyes when the preoperative acuity is better than 20/200.)

 RAM data supports the usefulness of measuring retinal acuity to predict good and poor outcomes.

Hofeldt, A.J.: Illuminated near card assessment of potential visual acuity. J Cataract Refract Surg. 22:367-371, 1996.

Capsule Alone: Excellent Predictions (100%)
Co-Morbid Disease: Excellent Predictions (100%)
  Data Link

Weiss, M.J. and Hofeldt, A.J.: Illuminated near card assessment of potential acuity in macular disease. Vitreous Society Meeting, 1996.

Co-Morbid Disease: Excellent Predictions (98%)    Data Link

Asbell, P.A., Krashin-Bishler, I, Perez, V., Schechter, C. and So, P.: Scientific Poster #253, American Academy of Ophthalmology, 1996. 

Glaucoma: Excellent agreement with distance acuity (92%)  Data Link

Hofeldt, A.J. and Weiss M.J.: The illuminated near card assessment of acuity in eyes with cataract. Ophthalmology 105, 1531-6, 1998. 

Cataract Alone: Excellent Predictions (97%)
Co-Morbid Disease: Excellent Predictions (100%)    Data Link

Chang, MA, Airiani, S, Miele, D, Braunstein, RE : A Comparison of the Potential Acuity Meter (PAM) and the Illuminated Near Card (INC) in Patients undergoing Phacoemulsification.  EYE 2006) 20, 1345–1351.

Cataract Alone: Excellent Predictions (94%)
Co-Morbid Disease: Excellent Predictions (93%)
      Data Link

 

Park, JI, Oh, SH, Kim, JH, Moon, SW, Lee, DH:  The Potential Role of the Retinal Acuity Meter For Predicting Visual Outcome after Cataract SurgeryJ Korean Ophthalmol Soc. 2007 Jul;48(7):898-904

            Cataract Alone: Excellent Predictions (91.6%)*
           
Co-Morbid Disease: Excellent Predictions (90.9%)
   Data Link


Suhr,A. W. Cataract surgery outcomes better predicted by meter than by potential acuity pinhole technique
Accurate preoperative assessment of retinal acuity can provide direction for patient, surgeon.  Ophthalmology Times, 2009.

            Cataract Alone: Excellent Predictions, Same line 50%, within 1 line in 88% Data Link

Studies Comparing RAM® to PAM  

Asbell, P.A., Krashin-Bishler, I, Perez, V., Schechter, C. and So, P.: Scientific Poster #253, American Academy of Ophthalmology, 1996. 

Glaucoma: Excellent agreement with distance acuity (92%)  Data Link

 

Chang, MA, Airiani, S, Miele, D, Braunstein, RE : A Comparison of the Potential Acuity Meter (PAM) and the Illuminated Near Card (INC) in Patients undergoing Phacoemulsification.  EYE advance online publication, 23 September 2005

Cataract Alone: Excellent Predictions (94%)
Co-Morbid Disease: Excellent Predictions (93%)
      Data Link

Non-Ophthalmologic Study with the RAM 

Albert, S.M., Bear-Lehman, J., Burkhardt, A.: Disparities Between Ambient, Standard Lighting and Retinal Acuities in Community-Dwelling Older People: Implications for Disability J American Geriatrics Society 54:1713-1718, 2006.

Testing retinal acuity with the RAM® in the home, it was found that  visual acuity could be potentially improved in 61% of this study group by about 2.5 lines of letters if ocular conditions were diagnosed and treated.   Data link

 

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