摘要:

ABSTRACTThe reading addition required by each of 30 subjects in this study was determined subjectively by means of five different cross-cylinder targets and under three photopic luminance levels of 3.5, 30, and 220 cd per m2. We conclude that the amount of the reading addition is not significantly affected by moderate changes in target configuration nor by changes in specific photopic luminance levels of either fluorescent or incandescent light.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

ABSTRACTThe monocular visual acuities of six children aged 4 months to 8 years were measured using visual evoked potentials (VEP's) before and during patching therapy. A seventh child had both Snellen and VEP monocular acuities determined before patching. In a cooperative child, it was estimated that VEP acuity was within 0.25 octaves (one line on an eye chart) of Snellen acuity. In the four children less than 3 years of age, patching resulted in a 1.8-octave decrease in acuity of the patched eye and a 2.0-octave improvement in the unpatched eye. After cessation of patching therapy, acuity of the previously patched eye improved 2.0 octaves and that of the abnormal eye declined 1.75 octaves. In the two children older than 4 years, patching resulted in a 1.25-octave acuity decrease in the patched eye. Cessation of patching resulted in a 1.25-octave improvement in acuity of the patched eye. No permanent deleterious effects of patching on acuity were observed.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

ABSTRACTTen stereophotogrammetry students and three graduate photogrammetrists were given 7 weeks of nonspecific orthoptic exercises. The visual systems of these 13 experimental subjects were matched to those of 13 control subjects chosen from the students and staff of the Ferris State College of Optometry. Stereoscopic acuities were determined before and after the training period on both groups using a Wild Stereoplotter, a Howard-Dolman apparatus, and the Keystone Multi-Stereo Test. Stereoscopic acuities as determined on the Stereoplotter and the Howard-Dolman apparatus were improved at better than a 0.05 significance level as computed on the Wilcoxon signed rank test and Student's t-test for the difference between two dependent means.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

ABSTRACTWe measured ocular accommodation in the cat with a continuously recording infrared optometer. The brain stem reticular formation in an anesthetized cat was stimulated electrically with microelectrodes to evoke accommodation. Sites in the mesencephalic reticular formation caudal and ventral to the III nerve nucleus near the midline gave large positive accommodation responses. The velocity and amplitude of positive accommodation was graded, depending on the applied current and frequency of stimulation. Relaxation of accommodation proceeded at a fairly constant rate upon cessation of electrical stimulation. These findings provide new information on the amplitude and dynamic aspects of ocular accommodation in the cat. Also, the location of the stimulating electrodes suggest that in addition to the Edinger-Westphal nucleus, areas in the mesencephalic reticular formation between the cerebellum and the oculomotor nucleus are involved in ocular accommodation in the cat.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

ABSTRACTThis paper is a compendium of 55 reports from the AmericanJournal of Opthalmology, theBritish Journal of Ophthalmology, and theArchives of Ophthalmologyfrom July 1979 to June 1980. It reviews reports on the effect of light on the retina, retinitis pigmentosa, diabetic retinopathy, sickle cell retinopathy, toxoplasmosis, histoplasmosis, maculopathies, retinoblastoma, retrolental fibroplasia, and other retinopathies.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

ABSTRACTData collected by a survey of ophthalmologists and optometrists in 1974 show the use of ancillary personnel in ophthalmologiesl and optometric practices of various types. Aides were widely used and appear to increase productivity in both optometric and ophthalmological practices.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

ABSTRACTThe authors present a colored photograph of the meibomian glands.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID