(n.) That refractive condition of the eye in which the rays of light are all brought accurately and without undue effort to a focus upon the retina; -- opposed to hypermetropia, myopia, an astigmatism.
Example Sentences:
(1) Of the adult aphakic cases, 80% were within 3 diopters of emmetropia at six months, with four cases showing an undercorrection.
(2) Seventy-three percent of the patients were within 3 diopters of emmetropia after surgery.
(3) We analyzed 450 consecutive cases of intraocular lens implantation (omitting only two inadvertent implantations in patients with high myopia) to determine the dioptric lens power in each case required to produce emmetropia.
(4) Fifty percent were within 2 diopters (D) of emmetropia and 92% within 3 D. All pediatric aphakic patients showed an improvement in best-corrected acuity, and 83% of eyes at 6 months were within 2 D of emmetropia; by 1 year a 3.4-D average myopic shift had occurred.
(5) At the time of entry into the USAF, refractive error data were clustered around emmetropia with a definite skew toward hyperopia.
(6) Twenty-one out of 43 eyes achieved refractive errors within 2 diopters (D) of emmetropia.
(7) The postoperative refraction and actually implanted IOL power were used to determine the IOL power needed for emmetropia.
(8) Eighty-three percent of eyes receiving intraocular lenses were within 2 D of emmetropia.
(9) The eyes of neonates grow from ametropia (refractive error) toward emmetropia.
(10) Further analysis demonstrated that results of unaided acuity and proximity to emmetropia were much better for low (< -2.87 D) and moderate (-3.0 to -5.87 D) than for high (> -6.0 D) myopes.
(11) Refraction showed 61.3% to be within 1 dioptre of emmetropia and 86.7% were within 2 dioptres.
(12) Although the optic-nerve-sectioned eye can sense the sign of a refractive error and initially adjust growth accordingly, it eventually overshoots emmetropia and reverses the sign of the initial refractive error.
(13) Contrary to previous reports, we do not find consistent high hyperopia in the rat, but rather refractions that range from near emmetropia (-0.12 D) to extreme hyperopia (+18.95 D).
(14) The predicted postoperative refraction was more accurate by modified SRK formulae, especially between emmetropia and myopia up to 0.5 diopters.
(15) The data are valuable to the intraocular lens surgeons, in that they demonstrate the range and frequency of intraocular lens powers needed to achieve emmetropia in a large population sample.
(16) At three years after surgery, 58% of eyes had refractive error within one diopter of emmetropia; 26% were undercorrected, and 16% were overcorrected by more than one diopter.
(17) Use of mean values in a theoretic artificial intraocular lens power equation suggests that aphakic dogs require an implant of approximately 40 diopters to achieve emmetropia.
(18) Multiple regression analysis was employed to estimate the amount of preoperative correction required to achieve emmetropia in 129 spherical radial keratotomy procedures.
(19) Three of 14 younger patients and 35 of 54 older patients were within 3 D of emmetropia.
(20) There was continuous changing of refraction towards emmetropia in all refraction groups.
Hyperopia
Definition:
(n.) Hypermetropia.
Example Sentences:
(1) Hyperopia was more common in younger persons, but senile cataract, macular degeneration and palpebral dermatochalasis or blepharochalasis were more common in older persons.
(2) Special education students had a higher incidence of uncorrected hyperopia and binocular dysfunction.
(3) We investigated a nonsurgical means of reshaping the cornea to correct hyperopia, keratoconus, or myopia.
(4) Relative hyperopia may persist, in spite of complete removal of the tumor.
(5) We conclude that the causes of the ESR elevation are more significant risk factors for CRVO, and systemic hypertension and hyperopia continue to be the main risk factors for BRVO.
(6) Ametropias showed a prevalence of 51.9%; the most common refractive defect was myopia followed by astigmatism and hyperopia.
(7) Complete optical constants and physical dimensions are presented for eight ametropic rhesus eyes in the range from -11.00 diopters of myopia to +8.00 diopters of hyperopia and compared with the same measurements from 40 essentially emmetropic normal control eyes.
(8) Significant differences between the younger and older normals existed for all types of refractive error except hyperopia in only one eye.
(9) The patient and his family had many congenital anomalies including hereditary brachydactyly, syndactyly, and hyperopia.
(10) 5 esotropias, 1 exotropia, 1 straight-eyed hypermetropic anisometropia of 4 diopters; 1 false positive high hyperopia (of +2.5 diopters) of both eyes.
(11) Usually soft lenses are well tolerated, so that patients suffering from aphakia as well as hyperopia should always use this type of lense.
(12) At the time of entry into the USAF, refractive error data were clustered around emmetropia with a definite skew toward hyperopia.
(13) Phakic eyes develop 5-7 diopters of hyperopia when the vitreous cavity is filled with silicone oil, and this puts them in the same range as the silicone oil filled aphakic eyes.
(14) This experiment showed that in every instance the cycloplegic estimate was equal to or greater in hyperopia or less in myopia than when performed without drugs.
(15) Contrary to previous reports, we do not find consistent high hyperopia in the rat, but rather refractions that range from near emmetropia (-0.12 D) to extreme hyperopia (+18.95 D).
(16) A new approach to surgical correction of hyperopia (including aphakia) is advanced.
(17) Although the latter is possible, the hyperopia may be coincidental and masking an underlying mechanism.
(18) We reduced the enlarged blind spot in a patient with focal peripapillary hyperopia, without papilledema, to near normal size by using progressively stronger plus lenses.
(19) Over 30% of the high hyperopes developed strabismus by age 3 years, but none of the infants in the moderate hyperopia or family history groups developed strabismus.
(20) The authors handled 75 such cases by first prescribing spectacles for full correction of hyperopia, and surgical operations were performed to the residual esotropia after wearing the spectacles for 6 months.