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	1.	Reversed telescopes on visual efficiency scores in field-restricted patients. [electronic resource] by Krefman, R A Producer: 19810625 In: American journal of optometry and physiological optics vol. 58 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	A comparative evaluation of Readables to single vision lenses. [electronic resource] by Krefman, R A Producer: 19920622 In: Journal of the American Optometric Association vol. 62 Availability: No items available. Save to lists Add to cart (remove)
	3.	Reverse Galilean telescopic spectacles in unilateral aphakia. [electronic resource] by Krefman, R A Producer: 19811215 In: American journal of optometry and physiological optics vol. 58 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	4.	Working distance comparison of plus lenses and reading telescopes. [electronic resource] by Krefman, R A Producer: 19810224 In: American journal of optometry and physiological optics vol. 57 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	5.	Ocular torticollis caused by refractive error. [electronic resource] by Krefman, R A Goldberg, M F Producer: 19820924 In: Archives of ophthalmology (Chicago, Ill. : 1960) vol. 100 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	6.	Visual improvements with red-tinted glasses in a patient with cone dystrophy. [electronic resource] by Young, R S Krefman, R A Fishman, G A Producer: 19820521 In: Archives of ophthalmology (Chicago, Ill. : 1960) vol. 100 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	7.	Two additional benefits of dark glasses on rod vision in patients with congenital achromatopsia. [electronic resource] by Young, R S Krefman, R A Anderson, R J Fishman, G A Producer: 19830407 In: American journal of optometry and physiological optics vol. 60 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	8.	Lined multifocal wearers prefer progressive addition lenses. [electronic resource] by Boroyan, H J Cho, M H Fuller, B C Krefman, R A McDougall, J H Schaeffer, J L Tahran, R L Producer: 19950906 In: Journal of the American Optometric Association vol. 66 Availability: No items available. Save to lists Add to cart (remove)