Baseline unequal pupil size5/31/2023 ![]() ![]() Pauné J, Fonts S, Rodríguez L, Queirós A.Impact of pupil diameter on axial growth in orthokeratology. Chen Z, Niu L, Xue F, Qu X, Zhou Z, Zhou X, Chu R.Visual Acuity and Over-refraction in Myopic Children Fitted with Soft Multifocal Contact Lenses. Schulle KL, Berntsen DA, Sinnott LT, Bickle KM, Gostovic AT, Pierce GE, Jones-Jordan LA, Mutti DO, Walline JJ Bifocal Lenses in Nearsighted Kids (BLINK) Study Group.A 3-year Randomized Clinical Trial of MiSight Lenses for Myopia Control. Chamberlain P, Peixoto-de-Matos SC, Logan NS, Ngo C, Jones D, Young G.Bifocal and multifocal contact lenses for presbyopia and myopia control. Remón L, Pérez-Merino P, Macedo-de-Araújo RJ, Amorim-de-Sousa AI, González-Méijome JM.A randomized trial of soft multifocal contact lenses for myopia control: baseline data and methods. Walline JJ, Giannoni AG, Sinnott LT, Chandler MA, Huang J, Mutti DO, Jones-Jordan LA, Berntsen DA, BLINK Study Group.Predicting factors for progression of the myopia in the MiSight assessment study Spain (MASS). Prieto-Garrido FL, Verdejo JL, Villa-Collar C, Ruiz-Pomeda A.An important note is that 5mm BOZD's can influence vision in lower lighting conditions, 9 which may be important to some children and young adults. The sum of this data indicates that there is likely a relationship between pupil size, ortho-k lens design and myopia control efficacy, but we don't yet have enough guidance to make changes to clinical practice. Pupil size was measured, but any interaction between pupil size and myopia control was either not present or not reported in this research abstract. 7 No methodology was provided on how the BOZD was chosen for each patient.Ī randomized controlled trial 8 fit children with either a 5mm or 6mm BOZD, and found that the 5mm BOZD group exhibited only 0.15mm axial growth over two years, compared to 0.35mm in the 6mm BOZD group. In a retrospective study, it was found that when the pupil size was larger than the BOZD, the patient experienced slower axial elongation. This paper led to the interest in the interaction between the back optic zone diameter (BOZD) of ortho-k lenses, pupil size and myopia control efficacy. They hypothesized that a large pupil allows more myopic defocus shift for the peripheral retina, but did not measure it. One small but influential study reported that orthokeratology lens wearers with larger pupil diameters experienced greater myopia control efficacy than those with smaller pupils. We don't yet have the data available to see how pupil size may interact with visual acuity outcomes in children wearing these contact lenses for myopia control. 3ĭifferent contact lens designs will influence vision outcomes - two studies of the MiSight dual focus concentric contact lens have shown better than 6/6 or 20/20 equivalent, on average, 1,4 while the Biofinity centre distance aspheric +2.50 Add has been shown to need a mean -0.62D over-minus correction for best acuity. In both myopia control and multifocal designs, modelling has shown that a larger pupil size will increase the the area of the pupil covered by the varying focus powers - near and far, but smaller pupils may experience better distance vision. Vision outcomes can also be influenced by pupil size. For reference, the average pupil size in the BLINK study was 5.4 ± 0.7mm in mesopic and 6.5 ± 0.7mm in photopic conditions, in multi-ethnic children aged 7-11 years. 1 The BLINK study, which investigated medium- and high-add aspheric multifocal contact lenses for myopia control, measured pupil size but data has not yet been reported on any relationship between pupil size and myopia control efficacy. The myopia control efficacy of MiSight has been shown to be independent of pupil size. concentric dual focus MiSight and extended depth of focus Mylo), and aspheric multifocal designs which are also used for presbyopia (eg. ![]() These are myopia control specific designs (eg. You might have a serious eye, brain, or neck injury that requires emergency treatment.There are currently two main types of soft contact lenses are used in myopia control treatment on the market. If you experienced a head injury before your pupils changed in size, contact 911 or go to the hospital immediately. For example, be sure to mention if you’ve recently experienced:ĭepending on your symptoms and medical history, your doctor might order one or more tests to help diagnose the underlying cause of your anisocoria. You should also discuss any other symptoms you’ve been experiencing. If you don’t already have a provider, our Healthline FindCare tool can help you connect to physicians in your area.ĭuring your appointment, your doctor will examine your eyes and have your vital signs taken. If you notice a difference in size between your pupils, contact your doctor right away. How will your doctor diagnose the cause of anisocoria? ![]()
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