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Infrared photoretinoscope.
Schaeffel F, Farkas L, Howland HC. Schaeffel F, et al. Among authors: howland hc. Appl Opt. 1987 Apr 15;26(8):1505-9. doi: 10.1364/AO.26.001505. Appl Opt. 1987. PMID: 20454351
Simple pointspread retinoscope suitable for vision screening.
Howland HC, Sayles N, Cacciotti C, Howland M. Howland HC, et al. Among authors: howland m. Am J Optom Physiol Opt. 1987 Feb;64(2):114-22. doi: 10.1097/00006324-198702000-00007. Am J Optom Physiol Opt. 1987. PMID: 3826285
Optics of photoretinoscopy: results from ray tracing.
Howland HC. Howland HC. Am J Optom Physiol Opt. 1985 Sep;62(9):621-5. Am J Optom Physiol Opt. 1985. PMID: 4050964
Measurement of astigmatism by automated infrared photoretinoscopy.
Gekeler F, Schaeffel F, Howland HC, Wattam-Bell J. Gekeler F, et al. Among authors: howland hc. Optom Vis Sci. 1997 Jul;74(7):472-82. doi: 10.1097/00006324-199707000-00013. Optom Vis Sci. 1997. PMID: 9293513
Photorefraction of eyes: history and future prospects.
Howland HC. Howland HC. Optom Vis Sci. 2009 Jun;86(6):603-6. doi: 10.1097/OPX.0b013e3181a523c9. Optom Vis Sci. 2009. PMID: 19390473 Review.
Normal values and standard deviations for pupil diameter and interpupillary distance in subjects aged 1 month to 19 years.
MacLachlan C, Howland HC. MacLachlan C, et al. Among authors: howland hc. Ophthalmic Physiol Opt. 2002 May;22(3):175-82. doi: 10.1046/j.1475-1313.2002.00023.x. Ophthalmic Physiol Opt. 2002. PMID: 12090630
Infant astigmatism measured by photorefraction.
Howland HC, Atkinson J, Braddick O, French J. Howland HC, et al. Science. 1978 Oct 20;202(4365):331-3. doi: 10.1126/science.694540. Science. 1978. PMID: 694540
Irregular astigmatism after photorefractive keratectomy.
Endl MJ, Martínez CE, Klyce SD, McDonald MB, Coorpender SJ, Applegate RA, Howland HC. Endl MJ, et al. Among authors: howland hc. J Refract Surg. 1999 Mar-Apr;15(2 Suppl):S249-51. J Refract Surg. 1999. PMID: 10202735 No abstract available.
Laboratory, clinical, and kindergarten test of a new eccentric infrared photorefractor (PowerRefractor).
Choi M, Weiss S, Schaeffel F, Seidemann A, Howland HC, Wilhelm B, Wilhelm H. Choi M, et al. Among authors: howland hc. Optom Vis Sci. 2000 Oct;77(10):537-48. doi: 10.1097/00006324-200010000-00008. Optom Vis Sci. 2000. PMID: 11100892
Changes in corneal wavefront aberrations with aging.
Oshika T, Klyce SD, Applegate RA, Howland HC. Oshika T, et al. Among authors: howland hc. Invest Ophthalmol Vis Sci. 1999 Jun;40(7):1351-5. Invest Ophthalmol Vis Sci. 1999. PMID: 10359316
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