Erythropsia and Chromatopsia: Case Study and Brief Review

Vaphiades, Michael S.; Grondines, Brendan; Curcio, Christine A.

doi:10.1080/01658107.2020.1797824

Cited by 3 publications

(6 citation statements)

References 22 publications

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“…7 Phosphodiesterase type 5 inhibitors can inhibit cone-specific phosphodiesterase and induce cyanopsia. 2 , 8 Erythropsia, while not associated with medication, has been linked to retinal hemorrhages, which cause heme-mediated oxidative cone damage. 2 Unlike these chromatopsias, chloropsia is extremely uncommon and only rarely linked to a particular condition.…”

Section: Discussionmentioning

confidence: 99%

“… 2 , 8 Erythropsia, while not associated with medication, has been linked to retinal hemorrhages, which cause heme-mediated oxidative cone damage. 2 Unlike these chromatopsias, chloropsia is extremely uncommon and only rarely linked to a particular condition. Chloropsia may result from damage to photoreceptors and retinal ganglion cells but is rare.…”

Section: Discussionmentioning

confidence: 99%

“…Xanthopsia (yellow colored vision), cyanopsia (blue colored vision), and erythropsia (red colored vision) are well described chromatopsias that result in altered color perception and have been observed in various disorders. 2 , 3 , 4 , 5 , 6 , 7 , 8 These chromatopsias often occur due to damage to photoreceptors or retinal ganglion cells. 2 However, central chloropsia, which causes green tinged vision is rare.…”

Section: Introductionmentioning

confidence: 99%

“… 2 , 3 , 4 , 5 , 6 , 7 , 8 These chromatopsias often occur due to damage to photoreceptors or retinal ganglion cells. 2 However, central chloropsia, which causes green tinged vision is rare. We describe a unique case of cerebral chloropsia as the presenting symptom of CBS secondary to primary open-angle glaucoma.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Chloropsia in the Charles Bonnet syndrome

Bhatnagar

Ishihara

Pakravan

et al. 2022

American Journal of Ophthalmology Case Reports

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chloropsia in the Charles Bonnet syndrome

Bhatnagar

Ishihara

Pakravan

et al. 2022

American Journal of Ophthalmology Case Reports

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“…Systemic comorbid conditions including neurological diseases and medications that could cause dyschromatopsia also led to exclusion. [ 18 ] Those unable to comprehend the instructions or to handle the mobile based app were also removed.…”

Section: Methodsmentioning

confidence: 99%

Dyschromatopsia and contrast sensitivity changes in COVID-19 patients

Sharma,

Singh,

Bansal

et al. 2023

Indian Journal of Ophthalmology

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Purpose: To evaluate the alterations in the psycho-physical tests, contrast sensitivity (CS) and hue discrimination (total estimation score, TES) in COVID-19 patients. Methods: A prospective case-control study was undertaken in 2021-22 to look at CS and TES among COVID-19 patients and RT-PCR negative normal subjects by a mobile app “smart optometry” and X-Rite’s free online version of Farnsworth-Munsell 100 hue test. Strict visual acuity (minimum of 6/9 equivalent on Snellen) and other clinical parameters were used as exclusion criteria to filter potentially confounding pre-receptoral co-morbid conditions. The effect of mismatch in recruiting age and sex matched controls during the pandemic were analyzed by multivariate linear regression. Result: One-way ANOVA ruled out any influence of gender on CS and TES; however, there was significant difference in the TES on Mann Whitney U test (TES- 2.95 +/- 3.8 for cases; 0.30 +/- 1.1 for controls; p <0.001) and it persisted after accounting for age. Six controls with breakthrough infections had a significant deterioration in TES (Mean scores -3.0; 95% CI = -5.89 to -0.11; p = 0.04) on paired t test. Qualitative analysis showed that S-cone mediated deficiencies outnumber those affecting M-L cone mediated deficiencies. Among 53 subjects exhibiting three sensory features, anosmia, loss of taste and dyschromatopsia, nine (16.98%) had all features concurrently. Conclusion: The study demonstrates that COVID-19 infection leads to altered TES representing dyschromatopsia -an ocular counterpart of anosmia, with little difference on CS.

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Pushpeeyam Adhyaya of Bhela Indriya Sthana

Gupta

Mamidi

2021

Journal of Integrated Health Sciences

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Bhela samhita is an ancient Indian textbook of medicine composed by Maharshi Bhela. Indriya sthana is one among the eight sections of Bhela samhita, and it consists of 12 chapters deals with prognostic aspects. Pushpeeyam adhyaya is the 11th chapter of Bhela indriya sthana which consists of 20 verses. Previous works have explored the prognostic potential of various chapters of Bhela indriya sthana. No studies have been conducted on “Pushpeeyam adhyaya” till date. The present study aims to explore the contents of “Pushpeeyam adhyaya” with the help of contemporary medical literature and principles of Freud's interpretation of dreams. Various databases have been searched to identify suitable studies (published in English language) by using appropriate key words. Various conditions such as visual perceptual distortions (erythropsia, photopsia, hyperchromatopsia, achromatopsia, metamorphopsia, etc.), Charles Bonnet syndrome, Anton-Babinski syndrome, retinal and vitreous detachments, end-of-life dreams and visions, hypnagogic visual hallucinations with sleep bruxism, temporal lobe epilepsy, occipital lobe seizures, pilomotor seizures, and psychiatric or neuropsychiatric conditions are documented in “Pushpeeyam adhyaya.” Various dreams such as bad, inauspicious, neutral, wish fulfilling, nightmares, day dreams, lucid dreams, bizarre or absurd dreams and dreams having animal figures, and colors along with their consequences (either death or survival) are documented in “Pushypeeyam adhyaya.” Analysis of dreams with the help of “Freud's interpretation of dreams” principles has revealed that the dreams documented in “Pushpeeyam adhyaya” seems to be rationale. Prognostic estimation based on odors emitted by patients (pushpeeyam) and analyzing dreams (swapna vignaana) of patients are having paramount importance (due to their cost-effectiveness, noninvasiveness, and feasibility) in resource-poor settings. Various hypotheses generated by the present work may pave the way for future research studies.

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Erythropsia and Chromatopsia: Case Study and Brief Review

Cited by 3 publications

References 22 publications

Chloropsia in the Charles Bonnet syndrome

Chloropsia in the Charles Bonnet syndrome

Dyschromatopsia and contrast sensitivity changes in COVID-19 patients

Pushpeeyam Adhyaya of Bhela Indriya Sthana

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