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Chinese Journal of Lasers, Volume. 52, Issue 3, 0307205(2025)

Heat Transfer Model and Photothermal Conversion in Laser Therapy for Retinal Diseases

Xinyu Jiang1, Jing Feng1, Dong Li1、*, Liang Yao2, and Yuping Zheng2
Author Affiliations
  • 1State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi , China
  • 2Department of Ophthalmology, The Second Affiliated Hospital, Xi’an Jiaotong University, Xi’an 710004, Shaanxi , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
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    References (32)
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    Figures & Tables(14)
    Schematic diagram of laser surgery procedure of retinal [29]

    Fig. 1. Schematic diagram of laser surgery procedure of retinal [29]

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    Model diagram of full eye structure and porous fundus

    Fig. 2. Model diagram of full eye structure and porous fundus

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    Comparison of transient calculation results of coupled full-eye model with experimental results from reference

    Fig. 3. Comparison of transient calculation results of coupled full-eye model with experimental results from reference

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    Results after TTT treatment. (a) Full-eye temperature distribution; (b) photoreceptor temperature

    Fig. 4. Results after TTT treatment. (a) Full-eye temperature distribution; (b) photoreceptor temperature

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    Temperature distribution of each layer of fundus after TTT treatment. (a) Temperature of retinal neural epithelium stroma; (b) temperature of retinal neural epithelium blood; (c) temperature of RPE stroma; (d) temperature of RPE blood; (e) temperature of choroidal stroma; (f) temperature of choroidal blood

    Fig. 5. Temperature distribution of each layer of fundus after TTT treatment. (a) Temperature of retinal neural epithelium stroma; (b) temperature of retinal neural epithelium blood; (c) temperature of RPE stroma; (d) temperature of RPE blood; (e) temperature of choroidal stroma; (f) temperature of choroidal blood

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    Temperature distribution of fundus along pupil axis after TTT treatment

    Fig. 6. Temperature distribution of fundus along pupil axis after TTT treatment

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    Results after PRP treatment. (a) Full-eye temperature distribution; (b) photoreceptor temperature

    Fig. 7. Results after PRP treatment. (a) Full-eye temperature distribution; (b) photoreceptor temperature

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    Temperature distribution of each layer of fundus after PRP treatment. (a) Temperature of retinal neural epithelium stroma; (b) temperature of retinal neural epithelium blood; (c) temperature of RPE stroma; (d) temperature of RPE blood; (e) temperature of choroidal stroma; (f) temperature of choroidal blood

    Fig. 8. Temperature distribution of each layer of fundus after PRP treatment. (a) Temperature of retinal neural epithelium stroma; (b) temperature of retinal neural epithelium blood; (c) temperature of RPE stroma; (d) temperature of RPE blood; (e) temperature of choroidal stroma; (f) temperature of choroidal blood

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    Temperature distribution of fundus along pupil axis after PRP treatment

    Fig. 9. Temperature distribution of fundus along pupil axis after PRP treatment

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    Results after SDM treatment. (a) Full-eye temperature distribution; (b) photoreceptor temperature

    Fig. 10. Results after SDM treatment. (a) Full-eye temperature distribution; (b) photoreceptor temperature

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    Temperature distribution of each layer of fundus after SDM treatment. (a) Temperature of retinal neural epithelium stroma; (b) temperature of retinal neural epithelium blood; (c) temperature of RPE stroma; (d) temperature of RPE blood; (e) temperature of choroidal stroma; (f) temperature of choroidal blood

    Fig. 11. Temperature distribution of each layer of fundus after SDM treatment. (a) Temperature of retinal neural epithelium stroma; (b) temperature of retinal neural epithelium blood; (c) temperature of RPE stroma; (d) temperature of RPE blood; (e) temperature of choroidal stroma; (f) temperature of choroidal blood

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    Temperature distribution of fundus along pupil axis after SDM treatment

    Fig. 12. Temperature distribution of fundus along pupil axis after SDM treatment

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    • Table 1. Physical and geometric parameters of tissues in coupled full-eye model[7,30,26]

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      Table 1. Physical and geometric parameters of tissues in coupled full-eye model[7,30,26]

      Tissue

      Specific heat /

      （J∙ kg-1∙K-1）

      Density /

      （kg∙m-3）

      Thermal conductivity /

      （W∙m-1∙K-1）

      Thickness

      H /μm

      Cornea417810500.580.45
      Aqueous humor39979960.5782.8
      Iris334011000.4980.35
      Lens399710500.44.25
      Vitreous humor399710000.59415.34
      Retinal nerve417810000.580.21
      RPE419010000.6280.01
      Choroid417810000.580.25
      Sclera318010501.00420.7

    • Table 2. Optical parameters of tissues in coupled full-eye model[29,31]

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      Table 2. Optical parameters of tissues in coupled full-eye model[29,31]

      TissueAbsorption coefficient /m-1Scattering coefficient /m-1Anisotropy factor
      Wavelength of 532 nmWavelength of 810 nmWavelength of 532 nmWavelength of 810 nmWavelength of 532 nmWavelength of 810 nm
      Cornea61.333.22226810500.90.9
      Aqueous humor13.410.410266.380.90.9
      Iris13.410.410266.380.90.9
      Lens3.283.29113.83105.220.90.9
      Vitreous humor1.783.15.015.30.90.9
      Retinal nerve *Blood2530040075610452400.980.98
      Tissue3805822140163400.970.97
      RPE*Blood8900035000140600956000.9950.995
      Tissue3805823150142700.840.84
      Choroid *Blood2530040075610452400.980.98
      Tissue3470112029300186500.870.87
      Sclera310.219.867980292700.90.9
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    Xinyu Jiang, Jing Feng, Dong Li, Liang Yao, Yuping Zheng. Heat Transfer Model and Photothermal Conversion in Laser Therapy for Retinal Diseases[J]. Chinese Journal of Lasers, 2025, 52(3): 0307205

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    Paper Information

    Category: Optical Diagnostics and Therapy

    Received: Sep. 19, 2024

    Accepted: Nov. 7, 2024

    Published Online: Jan. 20, 2025

    The Author Email: Li Dong (lidong@mail.xjtu.edu.cn)

    DOI:10.3788/CJL241218

    CSTR:32183.14.CJL241218

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology