Browsing by Author "Sachitanand Singh"

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    Comparison of Stereopsis, Contrast Sensitivity and Near Points of Accommodation In Patients With Degree of Myopia
    (Chitkara University Publications, 2021-04-14) Sachitanand Singh; Renu Thakur; Diksha Kumari; Prachi Yadav; Bipina Gautam
    Background: Stereopsis is the ability to perceive depth in objects through binocular vision, where the brain interprets 2-dimensional retinal images as 3-dimensional shadows. It plays a crucial role in assessing and understanding the objects we see. Factors like sensory and motor fusion greatly influence the quality of stereoscopic vision. Myopia, a condition characterized by nearsightedness, can negatively impact stereopsis. Contrast sensitivity refers to the ability to discern sharp outlines and detect subtle differences in shading and patterns. It helps identify objects with unclear boundaries against their background. Purpose: This study aimed to compare Stereopsis, Contrast Sensitivity, and Near Point of Accommodation among individuals with different grades of Myopia and Emmetropia. Methods: A cross-sectional comparative study was conducted at Nandadeep Eye Hospital, Maharastra, involving staff and patients aged 15 to 30 years. Participants with strabismus, anisometropia, previous ocular surgery, ocular diseases, or systemic conditions were excluded. The assessments included objective and subjective refraction eye examinations, as well as measurements of stereopsis, contrast sensitivity, and near point of accommodation. Results: The results, based on 109 subjects, indicated no significant change in contrast sensitivity between emmetropes and myopes. However, there were significant differences in stereoacuity and NPA among different grades of myopes compared to emmetropes. Conclusions: the study suggests that optometrists and eye healthcare professionals should assess stereopsis and near point of accommodation in severely myopic patients even after optical correction, and consider vision therapy if necessary, as it is an effective treatment for accommodative and binocular vision anomalies.
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    Visumax Femtosecond Laser Impact on Myopic Residual Refractive Error
    (Chitkara University Publications, 2021-10-16) Kaushal Kishor Sahu; Sachitanand Singh; Renu Thakur
    Background: Compare the residual refractive power following “small incision lenticule extraction” (SMILE) surgical correction in myopic patients with moderate to severe myopia and myopic astigmatism. Aim: To study the pre op with post op residual refractive status comparison in low to high myopia and myopic astigmatism patients under gone ReLEx SMILE operation. Methods: Prospective comparative analysis with 65 eyes of 33 patients classified into three groups19: mild myopia -1.00 to -3.00 D, moderate myopia -3.25 to -6.00 D, and high myopia -6.25 to -10.00 D, comprising spherical and cylindrical using spherical equivalent (SE). Using the SMILE surgery, each patient were corrected for myopic refractive error. Retinoscope was conducted preoperatively and postoperatively one day and one month following surgery, respectively. Results: Pre op 1 day and 1 month are showing a significant and gradual decrease where low and high myopia are compared, which is statistically significant for both one day (0.007) and one month (0.001) post operatively, but low to moderate (0.282) and moderate to high (0.147) post operatively 1 day and 1 month it is not statistically significant. This indicates that high myopia has greater residual power than low and moderate myopia. Conclusion: This research concludes that residual power increases as myopia increases in severity. As the objective residual power after SMILE surgery is less than +/- 0.50D in approximately 75% – 80% of eyes, SMILE surgery is a suitable alternative for refractive surgery correction with less complications than other refractive surgery techniques.