Focus correction in an apodized system with spherical aberration

Bernal-Molina, Paula; Castejón-Mochón, José Francisco; Bradley, Arthur; López‐Gil, Norberto

doi:10.1364/josaa.32.001556

Cited by 5 publications

(4 citation statements)

References 37 publications

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“…If an optical system measures the refraction of an eye under cycloplegia using minimum RMS refraction, which is equivalent to the system looking for maximum intensity of the image of a point source on the retina, 31 such as many autorefractometers, or similar to the use of retinoscopy, 32 the accommodation or the AA will depend on the image formed by rays passing through the whole pupil. Then, accommodation will be smaller than measurements obtained when only paraxial rays are taken into account (black rays in Fig.…”

Section: Discussionmentioning

confidence: 99%

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Effect of phenylephrine on static and dynamic accommodation

Águila-Carrasco

Lara

Bernal-Molina

et al. 2019

Journal of Optometry

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Section: Discussionmentioning

confidence: 99%

“…2). As a consequence, subjects could tolerate greater lags in accommodation because the tolerance is larger to negative defocus 31 …”

Section: Discussionmentioning

confidence: 99%

Effect of phenylephrine on static and dynamic accommodation

Águila-Carrasco

Lara

Bernal-Molina

et al. 2019

Journal of Optometry

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“…The role of the intensity distribution of the input beam has been investigated in the literature [95]. Focus correction in an apodized system with spherical aberration has been investigated by Bernal et al [96]. Recently Naresh et al have shown the effect of a parabolic apodizer on improving the imaging of optical systems with coma and astigmatism aberration [97].…”

Section: Theory Of Tight Focusing For Circular Basis Hyops Beamsmentioning

confidence: 99%

Influence of Primary Coma on the Tightly Focusing Characteristics of Circular Basis Hybrid Order Poincaré Sphere Beams

Pal,

Singh,

Senthilkumaran

2024

Photonics

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Analogous to the Poincaré sphere, a hybrid order Poincaré sphere is used to represent the ellipse field singularities (C-points). We study the tight focusing properties of generic bright and dark hybrid order Poincaré sphere beams in the presence of primary coma. The role of the polarization singularity index and handedness of the polarization of the hybrid order Poincaré sphere beams on the focused structure has been discussed. Results have been presented for the total intensity, component intensities, and component phase distributions for left- and right-handed bright and dark star and lemon types singularities. The presence of primary coma distorted the focal plane intensity distributions for both positive and negative index generic C-points. Coma is known to disturb the circular symmetry of the focal plane intensity distribution. Similarly in tight focusing polarization is known to disturb the symmetry. Therefore, a beam with structured and inhomogeneous polarization distribution tightly focused under the influence of coma is a fit case to study. It is found that the presence of primary coma aberration in the focusing system produces a positional shift of the high-intensity peaks and a reduction of the intensity on one side of the center. As the strength of the primary coma increases, the focal plane intensity distributions shift more and more toward the right from the initial position. Unlike the scalar vortex case, in the case of hybrid order Poincaré sphere beams, the focal plane intensity distribution undergoes rotation, as the helicity of the hybrid order Poincaré sphere beams is inverted, in addition to shifting. All the component phase distributions are found to be embedded with phase vortices of charge ±1.

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“…It has been used in the form of pinhole contact lenses to improve vision in eyes with markedly irregular corneas [7]. Furthermore, the benefits on vision of the StilesCrawford effects [8][9][10][11][12] can be potentially simulated with an apodized pupil [13,14]. It has also been shown that the natural limitation of the eyelids caused by ptosis may itself modify the refractive state of the eye [10].…”

Section: Introductionmentioning

confidence: 99%

Improving vision by pupil masking

Bonaque-González¹,

Ríos-Rodríguez²,

López‐Gil³

2016

Biomed. Opt. Express

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Abstract:We propose an alternative solution to improve visual quality by spatially modulating the amplitude of light passing into the eye (related to the eye's transmittance), in contrast to traditional correction of the wavefront phase (related to the local refractive power). Numerical simulations show that masking the aberrated areas at the pupil plane should enhance visual function, especially in highly aberrated eyes. This correction could be implemented in practice using customized contact or intraocular lenses.

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Focus correction in an apodized system with spherical aberration

Cited by 5 publications

References 37 publications

Effect of phenylephrine on static and dynamic accommodation

Effect of phenylephrine on static and dynamic accommodation

Influence of Primary Coma on the Tightly Focusing Characteristics of Circular Basis Hybrid Order Poincaré Sphere Beams

Improving vision by pupil masking

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