摘要:

A test procedure is outlined and norms are given for inter‐eye comparisons on the 100 Hue test. The norms are applied by taking the square root of the error score in each eye and obtaining the difference between the two square roots. This difference is compared with values given for the 0.05 and 0.01 probability levels. The calculation applies for all age groups and the norms are given for error scores less than 200. The method is particularly recommended in the clinical situation where a possible unilateral acquired dyschromatopsia can be assessed against a matched contro

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00382.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

A case of spontaneous hematoma in the right optic nerve and anterior part of the optic chiasm is reported. Contrary to general conception it gave rise to a homonymous hemianopia. It is suggested that surgical exploration of the chiasm be considered also in cases of unexplained acquired homonymous hemianopia. In the present case surgical removal of the hematoma resulted in restoration of full vision in a preoperatively practically blind eye, but still a homonymous hemianopia was present.

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00383.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

In this investigation of 2,091 eyes the occurrence of retinal detachment in the aphakic eye has been studied. Two groups are compared as to the incidence and type of cataract. Among 187 cases of aphakic retinal detachment in the second group, the relation between type of cataract, type of tear, cataract surgery and reattachment is recorded and the surgical procedure of the detachment discussed. The significant features and the course of the aphakic detachment are outlined and the predisposition to cataractous eye is emphasized.

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00384.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

When sensitive ultrasonic equipment is used, both clinical and experimental examinations reveal one or more low echoes in front of the high rear wall echoes if the sound beam is directed perpendicularly to the rear wall past the lens. In the experimental part of the study 7.5 MHz/2 mm, 6 MHz/5 mm and 6 MHz/8 mm transducers were used for the purpose of finding out the origin of these low echoes in pig eyes. The results showed that these low echoes were due to the difference in distances between the central and marginal parts of the sound beam caused by the curvature of the eye shell. Similar low echoes could be produced at clinical examinations at the frequencies of both 6 MHz and 10 MHz. The low echoes disappeared when the amplification of our equipment was lowered from 80 db to 72 db. Acoustic answers of low reflecting agents, as slight dense and flat preretinal exsudates or haemorrhages therefore can not be distinguished from these findings described above.

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00385.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

A total of 114 eyes affected with congenital cataract were examined by electroretinography prior to surgery. The preoperative electroretinogram (ERG) of 91 eyes was normal, of 17 eyes subnormal and in six eyes it was unrecordable.There was a clear‐cut relationship between a subnormal preoperative ERG and a poor postoperative visual acuity: of the 17 eyes of which the preoperative ERG was subnormal, the postoperative visual acuity of 12 eyes was<0.1 and of the remaining eyes 0.1–0.2. In the cases in which the preoperative ERG is unrecordable, the chance of restoring a good postoperative visual acuity by surgery is very small. The visual acuity of the six eyes in this series from which the preoperative ERG was unrecordable, was<0.1.The therapeutic possibilities of surgery cannot invariably be conclusively assessed from the normal preoperative ERG because the latter does not reflect possibly coexisting macular lesions or lesions proximal to the retina. Nevertheless, in cases in which the preoperative ERG is normal, the chance of achieving good therapeutic results with surgery is greater; out of 91 eyes in this series from which a normal preoperative ERG was recorded, the postoperative visual acuity of 10 eyes was<0.1, of 36 eyes, 0.1–0.2 and of 45 eyes, 0.3 or

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00386.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

A case of dominant retinitis pigmentosa (r.p.) is described in which the presumptive diagnosis of the condition was made when the patient was 7 months old, solely from the finding that the ERGs from both eyes were unrecordable, other characteristic ophthalmoscopic changes being absent. When the patient was 27 years old the ERGs of both eyes were still unrecordable and this together with the now established typical changes of the fundi, the abnormal shape of the dark adaptation curve and the characteristic field defects confirmed the earlier presumptive diagnosis of r.p.

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00387.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

Monochromatic light at 13 selected points of the spectrum was presented to the eyes of three normal subjects. Spectral sensitivity curves for the slow (a‐ and b‐waves) as well as the rapid (oscillatory) potentials were determined in response to light stimuli delivered in conditions of comparatively (1) strong light adaptation induced by light stimuli (at an interval of 15 sec) and (2) by weak light adaptation induced by light stimuli (at an interval of 2 min).From comparisons of the sensitivity functions obtained it was concluded that while there was a change of retinal sensitivity from predominantly photopic to scotopic type, no variation of the spectral sensitivity of the oscillations was recorded.In photopic as well as scotopic conditions studied, the oscillations revealed two peaks of sensitivity at 472 nm and 551 nm of the spectrum. Thus, the results seem to support earlier suggestions of the oscillatory potentials being related to an interaction by rod and cone activities and the origin of the oscillations being quite separate from that of the a‐ and b

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00388.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

A man with benign lymphadenosis of the orbit (published in this journal in 1956) remained free from symptoms after X‐ray treatment but subsequently died of liver metastases from a malignant epithelioma of unknown origin.Earlier experience of benign lymphadenosis of the skin indicates that this can appear in association with and probably secondary to malignant tumours in the skin or internal organs. It is postulated that the benign lymphadenosis of the orbit in the current case can have been such a paraneoplastic phenomeno

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00389.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

Light‐emitting diodes make appropriate test objects for the tangent screen because of their adjustability, longevity, and well‐defined stimulus properties. A prototype wand is described that provides seven luminance levels differing by a factor of 0.315, and a uniform distribution of light within a solid angle of 40 degr

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00390.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

On adaptation to white background light of different intensities the incremental threshold of the human ERG response was measured using monochromatic stimuli (Λmax = 450 nm and 579 nm, respectively).The curve of incremental thresholds of the oscillatory potentials is approximately linear with a slope of about 0.3 using blue (Λmax = 450 nm) as well as yellow (Λmax = 597 nm) stimuli. There was no sign of saturation i.e. rapid decrease in sensitivity of the oscillatory potentials on adaptation to the brightest background illumination used (2 times 105photopic cd/m2). No Purkinje shift, i.e. increase of sensitivity to long wave‐length stimulus on light adaptation, was recorded. The change of sensitivity of the slow potentials (a‐ and b‐wave) on light adaptation to backgrounds of varying intensities differed from that of the oscillations.Thus, the results were interpreted as further evidence that the oscillations are an expression of an interaction of photopic and scotopic activity. The origin of the oscillatory potentials also seems to be separate from that of the slow potentials (a‐ a

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1974.tb00391.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY