Binocular Visual Acuity in Intermittent Exotropia: Role of Accommodative Convergence

AbstractIncreasing surgical refinement of procedures to meet both biologic and esthetic demands of patients is seen in today's periodontal practice. For these new technologies, instruments, and surgical techniques are necessary. Technical skills of the clinician are challenged by the limit of range of visual acuity. Periodontal microsurgery improves the outcome of basic periodontal surgical procedures by enhancing normal vision through magnification along with favorable lighting system. It gives enhanced outcomes not possible with traditional macrosurgery in terms of passive wound closure and reduced tissue trauma. The purpose of this review is to provide brief knowledge of periodontal microsurgery: the role of magnification, microsurgical instrumentation and applications of microsurgery.

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Proximal versus Distal Cue Utilization in Spatial Navigation: The Role of Visual Acuity?,

Neurobiology of Learning and Memory ◽

10.1006/nlme.2002.4062 ◽

2002 ◽

Vol 78 (2) ◽

pp. 332-346 ◽

Cited By ~ 25

Author(s):

H Carman

Keyword(s):

Visual Acuity ◽

Spatial Navigation ◽

Cue Utilization

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The role of Peripheral Vision in the Flashed Face Distortion Effect

Perception ◽

10.1177/0301006618817419 ◽

2018 ◽

Vol 48 (1) ◽

pp. 93-101

Author(s):

Jamie Bowden ◽

David Whitaker ◽

Matt J. Dunn

Keyword(s):

Visual Acuity ◽

Analogue Scale ◽

Peripheral Vision ◽

Crowding Effect ◽

Visual Periphery ◽

Peripheral Location ◽

Distortion Effect ◽

Optical Defocus ◽

Visual Crowding

The flashed face distortion effect is a phenomenon whereby images of faces, presented at 4–5 Hz in the visual periphery, appear distorted. It has been hypothesized that the effect is driven by cortical, rather than retinal, components. Here, we investigated the role of peripheral viewing on the effect. Normally sighted participants viewed the stimulus peripherally, centrally, and centrally with a blurring lens (to match visual acuity in the peripheral location). Participants rated the level of distortion using a Visual Analogue Scale. Although optical defocus did have a significant effect on distortion ratings, peripheral viewing had a much greater effect, despite matched visual acuity. We suggest three potential mechanisms for this finding: increased positional uncertainty in the periphery, reduced deployment of attention to the visual periphery, or the visual crowding effect.

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Convergence, Accommodation, Fusion, and Stereopsis: What Keeps the Eyes Aligned in Intermittent Exotropia?

Scientifica ◽

10.1155/2018/9546979 ◽

2018 ◽

Vol 2018 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Costantino Schiavi ◽

Valentina Di Croce ◽

Laura Primavera ◽

Filippo Tassi

Keyword(s):

Patient Group ◽

Control Group ◽

Intermittent Exotropia ◽

Myopic Shift ◽

Infrared Video ◽

Group A ◽

Angle Of Deviation ◽

Convergence And Divergence ◽

Group B

Purpose. To investigate the relationships between angle of deviation, fusional convergence and divergence amplitude, AC/A ratio, near point of convergence (NPC), and myopia-phoria in intermittent exotropia (IXT). Methods. 93 patients with IXT, divided into two groups, were recruited in the study. In Group A (73 patients), fusional convergence and divergence amplitudes, NPC, and AC/A ratio were studied and compared with a control group. In Group B (in 20 patients), myopia-phoria while switching from monocular to binocular view was studied with an infrared video retinoscopy and compared with a control group. Results. In Group A, positive fusional amplitudes, NPC, and AC/A ratio of IXT patients did not differ from those of normals. Negative fusional amplitudes were significantly higher in the patient group than in the control group. In Group B, myopic shift was statistically significantly higher in the patient group and there was a statistically significant positive correlation between myopic shift and angle of strabismus. Conclusions. Apart from the role of fusional convergence which accounts for myopia-phoria, that of the other binocular functions in the control at near of IXT and conversely their specific role in the pathogenesis of IXT remain unclear and the cause of divergent infantile strabismus is still unknown.

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Visual Acuity at 6 Weeks after Small Incision Cataract Surgery and Role of Audit in Predicting Visual Acuity

European Journal of Ophthalmology ◽

10.1177/112067211002000214 ◽

2010 ◽

Vol 20 (2) ◽

pp. 345-352 ◽

Cited By ~ 6

Author(s):

Rajiv B. Khandekar ◽

Budhendra K. Jain ◽

Anand K. Sudhan ◽

Kamta P. Pandey

Keyword(s):

Visual Acuity ◽

Cataract Surgery ◽

Small Incision Cataract Surgery ◽

Small Incision

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BEYOND PSEUDO-ACCOMODATIVE CORNEA LASIK (PAC LASIK). A PERSONAL INSIGHT

International Journal of Case Reports ◽

10.28933/ijcr-2021-01-3005 ◽

2021 ◽

pp. 200

Author(s):

Keyword(s):

Visual Acuity ◽

Subjective Experience ◽

Critical Factor ◽

Patient’S Satisfaction ◽

Optical Part ◽

Personal Insight ◽

The Brain ◽

Mild Headache

Laser in-situ keratomieleusis (LASIK) is a common intervention for young, active, ametropic individuals to improve their visual acuity. pseudo-accommodative cornea (PAC), a variant of LASIK, to correct ametropia among presbyopic patients is proven in maintaining good distant vision; yet, the satisfactory spectacle free reading vision is limited to the ageing progression. However, successful treatments do not guarantee patient’s satisfaction. Assesment of the objective topographic indicators, visual acuity, higher order abrasion, and contrast sensitivity; revealed the clarification of a mild headache as a personal subjective experience after the treatment. The role of the persistent, dominant eye, the brain perception, seems to be critical factor to a patient’s satisfaction. To a certain degree, the interplay amongst the optical part and it’s supporting tissue, within and between the eyeballs, as well as its relationship to the neurosensory parts of the visual systems after Lasik surgery have not yet been assessed and reported elsewhere.

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Analysis of retinal detachment resulted from post-operative endophthalmitis treated with 23G pars Plana Vitrectomy

BMC Ophthalmology ◽

10.1186/s12886-021-02175-z ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Zheng Ying ◽

Casagrande Maria ◽

Dimopoulos Spyridon ◽

Bartz-Schmidt Karl-Ulrich ◽

Spitzer Matin Stephan ◽

...

Keyword(s):

Visual Acuity ◽

Retinal Detachment ◽

Cataract Surgery ◽

Intravitreal Injection ◽

Pars Plana Vitrectomy ◽

Clinical Evidence ◽

Prognostic Role ◽

Preoperative Visual Acuity ◽

Pars Plana

Abstract Background To evaluate the rate, risk factors, functional outcome and prognosis in eyes with retinal detachment after post-operative endophthalmitis treated with 23G Pars Plana Vitrectomy. Methods Electronic patient files from 2009 until 2018 were screened for the presence of an endophthalmitis. Included were 116 eyes of 116 patients. This population was evaluated for the rate of retinal detachment after 23G Pars Plana Vitrectomy for endophthalmitis following cataract surgery or intravitreal injection. The main outcome measures were retinal detachment and visual acuity. Results The reasons for endophthalmitis were previous cataract surgery in 78 patients and following intravitreal injection in 38 patients. The first clinical evidence of endophthalmitis was present in median 5 days after the triggering intervention. Twenty-five eyes (21.55%) developed a retinal detachment an average of 25 days after endophthalmitis. RD is significantly associated with preoperative visual acuity (p = 0.001). Conclusions We emphasize the prognostic role of preoperative visual acuity in RD development of the endophthalmitis treated with 23G Pars Plana Vitrectomy.

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Analysis of retinal detachment after post-operative endophthalmitis treated with 23G Pars Plana Vitrectomy

10.21203/rs.3.rs-223374/v1 ◽

2021 ◽

Author(s):

Ying Zheng ◽

Maria Casagrande ◽

Spyridon Dimopoulos ◽

Ulrich Bartz-Schmidt ◽

Martin Spitzer ◽

...

Keyword(s):

Visual Acuity ◽

Retinal Detachment ◽

Cataract Surgery ◽

Intravitreal Injection ◽

Pars Plana Vitrectomy ◽

Clinical Evidence ◽

Prognostic Role ◽

Preoperative Visual Acuity ◽

Pars Plana

Abstract Background To evaluate the rate, risk factors, functional outcome and prognosis in eyes with retinal detachment after post-operative endophthalmitis treated with 23G pars plana vitrectomy. Methods Electronic patient files from 2009 until 2018 were screened for the presence of an endophthalmitis. Included were 116 eyes of 116 patients. This population was evaluated for the rate of retinal detachment after 23G Pars Plana Vitrectomy for endophthalmitis following cataract surgery or intravitreal injection. The main outcome measures are retinal detachment and visual acuity. Results Reason for endophthalmitis was previous cataract surgery in 78 patients and following intravitreal injection in 38 patients. First clinical evidence of endophthalmitis was present in median 5 days after the triggering surgery. Twenty-five eyes (21.55%) developed a retinal detachment in average 25 days after endophthalmitis. RD is significantly associated with preoperative visual acuity (p = 0.001). Conclusions Modern 23G vitrectomy technique seems not to lower the rate of retinal detachment after vitrectomy for endophthalmitis. And we also emphasize the prognostic role of preoperative visual acuity in RD development of the endophthalmitis treated with 23G pars plana vitrectomy.

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