(1) We have reported the development of 1.6 diopters of myopia in a group of patients exposed to reptitive oxygen breathing at two atmospheres absolute pressure.
(2) The change in refractive astigmatism was as high as 1.50DC (diopter cylinder).
(3) The averaged anesthetized alignment pertained to the whole group of 6.2 prism diopters of esotropia, which correlated poorly with the preoperative deviation.
(4) Astigmatism greater than +1.25 diopters (as high as +5.50 diopters) was most commonly associated with dacryoceles (eight of 12 eyes) and with hemangiomas (14 of 17 eyes).
(5) An average of 8.20 diopters (standard deviation SD = 2.40 D) of flattening was obtained in 20 human donor eyes.
(6) Hyperphoria of over 1 prism diopter was extremely rare.
(7) To determine the effect of optically induced blur on the visual field measured with high pass spatially filtered targets, 10 normal subjects had field examinations with 0 diopter + 1.00 diopter or + 2.00 diopter of overcorrection in the cyclopleged state.
(8) Of the adult aphakic cases, 80% were within 3 diopters of emmetropia at six months, with four cases showing an undercorrection.
(9) By appropriate multivariate statistical analyses, about 95 per cent of the variance in results of surgery (expressed as change in deviation from preoperative to the postoperative time in prism diopters per millimeter of surgical correction) could be accounted for.
(10) Our patient's corneal curvature steepened almost 3 diopters following lenticule removal.
(11) A new laser iridotomy-sphincterotomy contact lens, bearing a 103-diopter optical button decentered 2.5 mm, gives the smallest iris focal spot and highest iris energy density practicably obtainable with a single optical glass refracting surface placed upon a thin Goldmann-type contact lens.
(12) After all sutures were removed, results showed an average decrease in myopia of 13.24 diopters (D) (range 1.75 to 23.25) principally from corneal flattening and a small reduction in axial length.
(13) With three observers, we compared the accuracy and reproducibility (precision) of the Marco Keratometer Model 1 and EyeSys Corneal Analysis System Model I using four poly(methyl methacrylate) spheres (37.50, 42.51, 47.54, and 55.06 diopters [D]), three steel spheres (40.50, 42.50, and 44.75 D), and 20 normal human eyes (41.50 to 46.00 D).
(14) To compare the effects of these two strategies, eight rabbits underwent bilateral 5.00-diopter myopic ablations, performed with a contracting diaphragm in one eye and an expanding diaphragm in the other.
(15) Surgically induced astigmatism, as absolute change in cylinder (without regard to axis) at three months postoperatively averaged 0.46 diopter (D) for the 4.0 mm incision group, 0.57 D for the 5.2 mm incision group, and 0.52 D for the 7.0 mm incision group.
(16) The range of preoperative myopia was - 1.50 diopters to - 17.50 D (spherical equivalent).
(17) Thirty-eight percent had more than 5 diopters (D) of astigmatism in the graft.
(18) Of the patients who underwent unilateral superior rectus recession, only six developed a significant (14 prism diopters or more) DVD in the unoperated eye.
(19) Postoperative astigmatism ranged between 0 and 4 diopters, with an average of 1.7 diopters.
(20) At one day after surgery, the larger incision group had significantly higher (P less than .01) mean keratometric cylinder (2.28 diopters vs 1.28 diopters in the small incision group).
Dioptre
Definition:
(n.) A unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter.
Example Sentences:
(1) In terms of the various keratometry values compared, mean K (corneal refractive power), flattest K, steepest K, astigmatism and the axis of astigmatism, 65% to 75% of the cases on automated keratometry were within 0.26 dioptres or 11 degrees of manually determined values; the difference was statistically significant (p < 0.001).
(2) The average increases in tonic accommodation and tonic vergence following reading were 0.35 dioptres and 0.38 metre angles, respectively.
(3) Residual refractive error was highly unpredictable, but did not exceed 6 dioptres.
(4) The centre of the subretinal depositis, and therefore the highest point of retinal detachment (3 dioptres), appears white.
(5) All concentrations of thymoxamine increased the accommodative amplitude by about 1.5 dioptres.
(6) At birth agreement between the two refractionists to within 1 dioptre spherical equivalent was 82%, rising to 94% at 1 year.
(7) Refraction showed 61.3% to be within 1 dioptre of emmetropia and 86.7% were within 2 dioptres.
(8) Accommodation decreased by about 0.5 dioptre after instillation of 5 x 5 microliter 10% phenylephrine.
(9) The author presents 31 cases of unilateral high myopic children up to age 12 with anisometropia between 4 and 19 dioptres.
(10) Biomicroscopical examination of the vitreous and peripheral retina was performed on 103 aphakic eyes with myopia of at least -6-0 dioptres.
(11) In forming a special contact lens for use in cases of keratoconus, the centre the curves vary from 7.2 mm (47 dioptres) to 5.6 mm (60 dioptres), and at the periphery the curve is a constant 7.65 mm (44 dioptres) in all lenses.
(12) Two patients had residual deviations: one child with 30 prism dioptres of residual esotropia had 400 arc seconds and the remaining patient, with 12 prism dioptres of exotropia and marked anisometropia, did not show stereopsis.
(13) One-third of patients in the latter age group, with symptoms, have a value of 3 prism dioptres or more whilst it is rare to find an asymptomatic patient with a value as large as this.
(14) However, measurements made with light restricted to the short end of the visible spectrum indicate only one or two dioptres of hyperopia and it is possible that the latter measurements are more coincident with natural conditions.
(15) The authors obtained a reduction of the refraction error of about 5 dioptres, in individual cases the astigmatism was also corrected with a good result.
(16) In photopic conditions one prism-dioptre causes a significant drop in sensitivity at all spatial frequencies and in mesopic conditions as little as a half prism-dioptre has a similar effect.
(17) Anisometropia is not significantly associated with esotropia (P = 0-31) unless there is spherical hypermetropia of +2-00 dioptres or more in the more emmetropic eye (P less than 0-001).
(18) More accurate results were obtained when the intraocular lenses were used in one dioptre steps.
(19) Appropriate use of base-out prisms may be useful objective test for detecting persistence of normal binocular vision (4-dioptre prism test).
(20) Three of the 16 had greater than 12 prism dioptres of esotropia, and none were exotropic.