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Retinal sensitivity in healthy Indians using microperimeter.

Gella L, Nittala MG, Raman R - Indian J Ophthalmol (2014)

Bottom Line: Males had significantly increased retinal sensitivity (18.34 vs. 18.17 dB, P = 0.03).Contrast sensitivity was significantly correlated with the mean retinal sensitivity (r = 0.432, P < 0.001).These normative values could help in drawing a meaningful conclusion in various retinal pathologies.

View Article: PubMed Central - PubMed

Affiliation: Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralaya, Chennai, Tamil Nadu, India.

ABSTRACT

Aims: To establish the retinal sensitivity values in healthy Indians using microperimeter.

Materials and methods: In this prospective study, 144 healthy volunteers were included. All the participants underwent a comprehensive ophthalmic examination including contrast sensitivity. Microperimetry was performed in the central 20° of the macula using 76 stimulus points to assess the retinal sensitivity, and the fixation characteristics in the study population were assessed.

Results: The mean age of the study sample was 43.08 ± 10.85 years (range: 25-69). Mean retinal sensitivity was 18.26 ± 0.99 dB. Males had significantly increased retinal sensitivity (18.34 vs. 18.17 dB, P = 0.03). The linear regression analysis revealed a 0.04 dB per year age-related decline in mean retinal sensitivity. Contrast sensitivity was significantly correlated with the mean retinal sensitivity (r = 0.432, P < 0.001). Fixation stability in the central 2° and 4° were 69% and 89%, respectively.

Conclusion: Microperimeter is an ideal tool to assess the retinal sensitivity and the fixation behavior. These normative values could help in drawing a meaningful conclusion in various retinal pathologies.

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Related in: MedlinePlus

Relationship between retinal sensitivity and age
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Figure 2: Relationship between retinal sensitivity and age

Mentions: Table 1 shows microperimetry parameters comparison between the genders. The mean retinal sensitivity of the study sample was 18.26 ± 0.99 dB. Males had significantly increased retinal sensitivity in all the degrees. There was a linear decline in retinal sensitivity to light with increase in age. The linear regression analysis revealed a 0.04 dB per year age-related decline in mean retinal sensitivity [Fig 2]. Significant positive correlation was found between logarithmic contrast sensitivity and the mean retinal sensitivity (r = 0.432, P <0.001). Table 2 shows age-wise mean retinal sensitivity. There was a significant difference in mean retinal sensitivity found between the groups (P <0.001).


Retinal sensitivity in healthy Indians using microperimeter.

Gella L, Nittala MG, Raman R - Indian J Ophthalmol (2014)

Relationship between retinal sensitivity and age
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4061663&req=5

Figure 2: Relationship between retinal sensitivity and age
Mentions: Table 1 shows microperimetry parameters comparison between the genders. The mean retinal sensitivity of the study sample was 18.26 ± 0.99 dB. Males had significantly increased retinal sensitivity in all the degrees. There was a linear decline in retinal sensitivity to light with increase in age. The linear regression analysis revealed a 0.04 dB per year age-related decline in mean retinal sensitivity [Fig 2]. Significant positive correlation was found between logarithmic contrast sensitivity and the mean retinal sensitivity (r = 0.432, P <0.001). Table 2 shows age-wise mean retinal sensitivity. There was a significant difference in mean retinal sensitivity found between the groups (P <0.001).

Bottom Line: Males had significantly increased retinal sensitivity (18.34 vs. 18.17 dB, P = 0.03).Contrast sensitivity was significantly correlated with the mean retinal sensitivity (r = 0.432, P < 0.001).These normative values could help in drawing a meaningful conclusion in various retinal pathologies.

View Article: PubMed Central - PubMed

Affiliation: Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralaya, Chennai, Tamil Nadu, India.

ABSTRACT

Aims: To establish the retinal sensitivity values in healthy Indians using microperimeter.

Materials and methods: In this prospective study, 144 healthy volunteers were included. All the participants underwent a comprehensive ophthalmic examination including contrast sensitivity. Microperimetry was performed in the central 20° of the macula using 76 stimulus points to assess the retinal sensitivity, and the fixation characteristics in the study population were assessed.

Results: The mean age of the study sample was 43.08 ± 10.85 years (range: 25-69). Mean retinal sensitivity was 18.26 ± 0.99 dB. Males had significantly increased retinal sensitivity (18.34 vs. 18.17 dB, P = 0.03). The linear regression analysis revealed a 0.04 dB per year age-related decline in mean retinal sensitivity. Contrast sensitivity was significantly correlated with the mean retinal sensitivity (r = 0.432, P < 0.001). Fixation stability in the central 2° and 4° were 69% and 89%, respectively.

Conclusion: Microperimeter is an ideal tool to assess the retinal sensitivity and the fixation behavior. These normative values could help in drawing a meaningful conclusion in various retinal pathologies.

Show MeSH
Related in: MedlinePlus