refraction

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  • noun

Synonyms for refraction

the change in direction of a propagating wave (light or sound) when passing from one medium to another

the amount by which a propagating wave is bent

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References in periodicals archive ?
In this study after removing cataract, patients were left aphakik and later glasses were prescribed after cycloplegic refraction with the help of retinoscopy.
On the first visit, cycloplegic refraction is usually performed as part of the comprehensive eye exam.
Therefore, cycloplegic refraction with 1% topical cyclopentolate hydrochloride drops was performed followed by prescription of maximal tolerable refractive correction.
Cycloplegic refraction measurements were taken before study commencement, every three months and at the end of the study.
It also includes cycloplegic refraction on behalf of the hospital eye service--if you receive a request for a cycloplegic refraction of a child then this can be claimed as an enhanced SEE.
Seventy-four patients under the age of 13 years with high myopia (cycloplegic refraction values <6 D) and 77 emmetropic control children who presented to our Pediatric Ophthalmology Department were evaluated in the course of this study.
In some patients, usually related with high amounts of latent hyperopia, if the total amount of cycloplegic refraction is corrected, when the effect of the cycloplegic drugs ends, the eye tries to recover values close to its "altered tonic state" of accommodation, causing a pseudomyopia and patient discomfort.
Preoperative evaluation consisted of uncorrected visual acuity for both--distance and near; best spectacle corrected visual acuity, manifest and cycloplegic refraction, ocular dominance, keratometry, applanation tonometry, scotopic pupillary size, tear film break up time, blinking rate, Schirmer test when necessary, pachymetry, slitlamp examination and computerized video keratography.
Cycloplegic refraction were carried out in children using 1% cyclopentolate eye drops.
Cycloplegic refraction revealed physiologic hypermetropia in both eyes corresponding to the age of the child and essentially normal fundus examination.
Additionally, Oliver showed a lead of accommodation, worse in his left eye (R +0.25 L -0.25), which was the likely source for his conflicting acuity and cycloplegic refraction results.
For those who were 4 years old or younger, a cycloplegic refraction was performed by instilling 2 drops of 1% cyclopentolate with 10 minutes apart for each eye separately followed by a retinoscopy.
Objective: To evaluate macular choroidal thickness (CT) and retinal thickness in Turkish patients with high myopia without maculopathy and in normal subjects and to examine the association with age, axial length (AL), best corrected visual acuity (BCVA), cycloplegic refraction, and spherical equivalent (SE).
METHODS: The study was conducted in school children by using the snellen's chart, subjective correction, cycloplegic refraction and ophthalmoscopic examination.
Latent hyperopia is a possibility and the difference between the retinoscopy and subjective result, slightly reduced accommodative amplitude, and stereoacuity results made the author consider undertaking a cycloplegic refraction. However, the equality of amplitude of accommodation in each eye, good and reasonably balanced monocular estimate method (MEM) retinoscopy result, lack of significant eso-deviation, and patient age, offered reassurance that a cycloplegic was unlikely to be useful.