Corneal Implants Market Size By Tissue Type (Human Donor, Artificial Cornea), By Transplant Type (Anterior Lamellar Keratoplasty, Endothelial Lamellar Keratoplasty, Penetrating Keratoplasty), By Condition (Fungal Keratitis, Fuchs Dystrophy, Keratoconus), By End-use (Hospitals, Eye Clinics, Ambulatory Surgical Centers), Industry Analysis Report, Regional Outlook, Condition Potential, Competitive Market Share & Forecast, 2019 – 2025

Report Content

Chapter 1. Methodology

1.1. Methodology

1.2. Market definitions

1.3. Forecast parameters

1.4. Data sources

1.4.1. Secondary

1.4.1.1. Paid sources

1.4.1.2. Unpaid sources

1.4.2. Primary

Chapter 2. Executive Summary

2.1. Corneal implants industry 360⁰ synopsis, 2014 - 2025

2.1.1. Business trends

2.1.2. Tissue type trends

2.1.3. Transplant type trends

2.1.4. Condition trends

2.1.5. End-use trends

2.1.6. Regional trends

Chapter 3. Corneal Implants Industry Insights

3.1. Industry segmentation

3.2. Industry landscape, 2014 - 2025

3.3. Industry impact forces

3.3.1. Growth drivers

3.3.1.1. Increasing incidence of eye diseases worldwide

3.3.1.2. Rising elderly population in developed economies

3.3.1.3. Growing demand for minimally invasive surgical procedure across the globe

3.3.2. Industry pitfalls and challenges

3.3.2.1. Risks associated with corneal implants

3.3.2.2. Shortage of donor material worldwide

3.4. Growth potential analysis

3.4.1. By tissue type

3.4.2. By transplant type

3.4.3. By condition

3.4.4. By end-use

3.5. Technology landscape

3.6. Porter’s analysis

3.7. Competitive landscape, 2017

3.7.1. Strategy dashboard

3.8. PESTEL analysis

Chapter 4. Corneal Implants Market, By Tissue Type

4.1. Key segment trends

4.2. Human donor

4.2.1. Market size, by region, 2014 – 2025 (USD Million)

4.3. Artificial cornea

4.3.1. Market size, by region, 2014-2025 (USD Million)

Chapter 5. Corneal Implants Market, By Transplant Type

5.1. Key segment trends

5.2. Anterior lamellar keratoplasty (ALK)

5.2.1. Market size, by region, 2014-2025 (USD Million)

5.3. Endothelial lamellar keratoplasty (ELK)

5.3.1. Market size, by region, 2014-2025 (USD Million)

5.4. Penetrating keratoplasty (PK)

5.4.1. Market size, by region, 2014-2025 (USD Million)

5.5. Others

5.5.1. Market size, by region, 2014-2025 (USD Million)

Chapter 6. Corneal Implants Market, By Condition

6.1. Key segment trends

6.2. Fungal keratitis

6.2.1. Market size, by region, 2014-2025 (USD Million)

6.3. Fuchs' dystrophy

6.3.1. Market size, by region, 2014-2025 (USD Million)

6.4. Keratoconus

6.4.1. Market size, by region, 2014-2025 (USD Million)

6.5. Others

6.5.1. Market size, by region, 2014-2025 (USD Million)

Chapter 7. Corneal Implants Market, By End-use

7.1. Key segment trends

7.2. Hospitals

7.2.1. Market size, by region, 2014-2025 (USD Million)

7.3. Eye clinics

7.3.1. Market size, by region, 2014-2025 (USD Million)

7.4. Ambulatory surgical centers (ASCs)

7.4.1. Market size, by region, 2014-2025 (USD Million)

Chapter 8. Corneal Implants Market, By Region

8.1. Key regional trends

8.2. North America

8.2.1. Market size, by country, 2014-2025 (USD Million)

8.2.2. Market size, by tissue type, 2014-2025 (USD Million)

8.2.3. Market size, by transplant type, 2014-2025 (USD Million)

8.2.4. Market size, by condition, 2014-2025 (USD Million)

8.2.5. Market size, by end-use, 2014-2025 (USD Million)

8.2.6. U.S.

8.2.6.1. Market size, by tissue type, 2014-2025 (USD Million)

8.2.6.2. Market size, by transplant type, 2014-2025 (USD Million)

8.2.6.3. Market size, by condition, 2014-2025 (USD Million)

8.2.6.4. Market size, by end-use, 2014-2025 (USD Million)

8.2.7. Canada

8.2.7.1. Market size, by tissue type, 2014-2025 (USD Million)

8.2.7.2. Market size, by transplant type, 2014-2025 (USD Million)

8.2.7.3. Market size, by condition, 2014-2025 (USD Million)

8.2.7.4. Market size, by end-use, 2014-2025 (USD Million)

8.3. Europe

8.3.1. Market size, by country, 2014-2025 (USD Million)

8.3.2. Market size, by tissue type, 2014-2025 (USD Million)

8.3.3. Market size, by transplant type, 2014-2025 (USD Million)

8.3.4. Market size, by condition, 2014-2025 (USD Million)

8.3.5. Market size, by end-use, 2014-2025 (USD Million)

8.3.6. Germany

8.3.6.1. Market size, by tissue type, 2014-2025 (USD Million)

8.3.6.2. Market size, by transplant type, 2014-2025 (USD Million)

8.3.6.3. Market size, by condition, 2014-2025 (USD Million)

8.3.6.4. Market size, by end-use, 2014-2025 (USD Million)

8.3.7. UK

8.3.7.1. Market size, by tissue type, 2014-2025 (USD Million)

8.3.7.2. Market size, by transplant type, 2014-2025 (USD Million)

8.3.7.3. Market size, by condition, 2014-2025 (USD Million)

8.3.7.4. Market size, by end-use, 2014-2025 (USD Million)

8.3.8. France

8.3.8.1. Market size, by tissue type, 2014-2025 (USD Million)

8.3.8.2. Market size, by transplant type, 2014-2025 (USD Million)

8.3.8.3. Market size, by condition, 2014-2025 (USD Million)

8.3.8.4. Market size, by end-use, 2014-2025 (USD Million)

8.3.9. Italy

8.3.9.1. Market size, by tissue type, 2014-2025 (USD Million)

8.3.9.2. Market size, by transplant type, 2014-2025 (USD Million)

8.3.9.3. Market size, by condition, 2014-2025 (USD Million)

8.3.9.4. Market size, by end-use, 2014-2025 (USD Million)

8.3.10. Spain

8.3.10.1. Market size, by tissue type, 2014-2025 (USD Million)

8.3.10.2. Market size, by transplant type, 2014-2025 (USD Million)

8.3.10.3. Market size, by condition, 2014-2025 (USD Million)

8.3.10.4. Market size, by end-use, 2014-2025 (USD Million)

8.4. Asia Pacific

8.4.1. Market size, by country, 2014-2025 (USD Million)

8.4.2. Market size, by tissue type, 2014-2025 (USD Million)

8.4.3. Market size, by transplant type, 2014-2025 (USD Million)

8.4.4. Market size, by condition, 2014-2025 (USD Million)

8.4.5. Market size, by end-use, 2014-2025 (USD Million)

8.4.6. China

8.4.6.1. Market size, by tissue type, 2014-2025 (USD Million)

8.4.6.2. Market size, by transplant type, 2014-2025 (USD Million)

8.4.6.3. Market size, by condition, 2014-2025 (USD Million)

8.4.6.4. Market size, by end-use, 2014-2025 (USD Million)

8.4.7. India

8.4.7.1. Market size, by tissue type, 2014-2025 (USD Million)

8.4.7.2. Market size, by transplant type, 2014-2025 (USD Million)

8.4.7.3. Market size, by condition, 2014-2025 (USD Million)

8.4.7.4. Market size, by end-use, 2014-2025 (USD Million)

8.4.8. Japan

8.4.8.1. Market size, by tissue type, 2014-2025 (USD Million)

8.4.8.2. Market size, by transplant type, 2014-2025 (USD Million)

8.4.8.3. Market size, by condition, 2014-2025 (USD Million)

8.4.8.4. Market size, by end-use, 2014-2025 (USD Million)

8.4.9. Australia

8.4.9.1. Market size, by tissue type, 2014-2025 (USD Million)

8.4.9.2. Market size, by transplant type, 2014-2025 (USD Million)

8.4.9.3. Market size, by condition, 2014-2025 (USD Million)

8.4.9.4. Market size, by end-use, 2014-2025 (USD Million)

8.4.10. South Korea

8.4.10.1. Market size, by tissue type, 2014-2025 (USD Million)

8.4.10.2. Market size, by transplant type, 2014-2025 (USD Million)

8.4.10.3. Market size, by condition, 2014-2025 (USD Million)

8.4.10.4. Market size, by end-use, 2014-2025 (USD Million)

8.5. Latin America

8.5.1. Market size, by country, 2014-2025 (USD Million)

8.5.2. Market size, by tissue type, 2014-2025 (USD Million)

8.5.3. Market size, by transplant type, 2014-2025 (USD Million)

8.5.4. Market size, by condition, 2014-2025 (USD Million)

8.5.5. Market size, by end-use, 2014-2025 (USD Million)

8.5.6. Brazil

8.5.6.1. Market size, by tissue type, 2014-2025 (USD Million)

8.5.6.2. Market size, by transplant type, 2014-2025 (USD Million)

8.5.6.3. Market size, by condition, 2014-2025 (USD Million)

8.5.6.4. Market size, by end-use, 2014-2025 (USD Million)

8.5.7. Mexico

8.5.7.1. Market size, by tissue type, 2014-2025 (USD Million)

8.5.7.2. Market size, by transplant type, 2014-2025 (USD Million)

8.5.7.3. Market size, by condition, 2014-2025 (USD Million)

8.5.7.4. Market size, by end-use, 2014-2025 (USD Million)

8.5.8. Argentina

8.5.8.1. Market size, by tissue type, 2014-2025 (USD Million)

8.5.8.2. Market size, by transplant type, 2014-2025 (USD Million)

8.5.8.3. Market size, by condition, 2014-2025 (USD Million)

8.5.8.4. Market size, by end-use, 2014-2025 (USD Million)

8.6. Middle East and Africa

8.6.1. Market size, by country, 2014-2025 (USD Million)

8.6.2. Market size, by tissue type, 2014-2025 (USD Million)

8.6.3. Market size, by transplant type, 2014-2025 (USD Million)

8.6.4. Market size, by condition, 2014-2025 (USD Million)

8.6.5. Market size, by end-use, 2014-2025 (USD Million)

8.6.6. South Africa

8.6.6.1. Market size, by tissue type, 2014-2025 (USD Million)

8.6.6.2. Market size, by transplant type, 2014-2025 (USD Million)

8.6.6.3. Market size, by condition, 2014-2025 (USD Million)

8.6.6.4. Market size, by end-use, 2014-2025 (USD Million)

8.6.7. Saudi Arabia

8.6.7.1. Market size, by tissue type, 2014-2025 (USD Million)

8.6.7.2. Market size, by transplant type, 2014-2025 (USD Million)

8.6.7.3. Market size, by condition, 2014-2025 (USD Million)

8.6.7.4. Market size, by end-use, 2014-2025 (USD Million)

8.6.8. UAE

8.6.8.1. Market size, by tissue type, 2014-2025 (USD Million)

8.6.8.2. Market size, by transplant type, 2014-2025 (USD Million)

8.6.8.3. Market size, by condition, 2014-2025 (USD Million)

8.6.8.4. Market size, by end-use, 2014-2025 (USD Million)

Chapter 9. Company Profiles

9.1. Alabama Eye Bank Inc

9.1.1. Business overview

9.1.2. Financial data

9.1.3. Product landscape

9.1.4. Strategic outlook

9.1.5. SWOT analysis

9.2. Alcon Inc.

9.2.1. Business overview

9.2.2. Financial data

9.2.3. Product landscape

9.2.4. Strategic outlook

9.2.5. SWOT analysis

9.3. Florida Lions Eye Bank

9.3.1. Business overview

9.3.2. Financial data

9.3.3. Service landscape

9.3.4. Strategic outlook

9.3.5. SWOT analysis

9.4. Presbia PLC

9.4.1. Business overview

9.4.2. Financial data

9.4.3. Product landscape

9.4.4. Strategic outlook

9.4.5. SWOT analysis

9.5. San Diego Eye Bank

9.5.1. Business overview

9.5.2. Financial data

9.5.3. Service landscape

9.5.4. Strategic outlook

9.5.5. SWOT analysis

9.6. CorNeat Vision Ltd.

9.6.1. Business overview

9.6.2. Financial data

9.6.3. Product landscape

9.6.4. Strategic outlook

9.6.5. SWOT analysis

9.7. Aurolab

9.7.1. Business overview

9.7.2. Financial data

9.7.3. Product landscape

9.7.4. Strategic outlook

9.7.5. SWOT analysis

9.8. DIPOTEX

9.8.1. Business overview

9.8.2. Financial data

9.8.3. Product landscape

9.8.4. Strategic outlook

9.8.5. SWOT analysis

9.9. AJL Ophthalmic SA (Intacs)

9.9.1. Business overview

9.9.2. Financial data

9.9.3. Product landscape

9.9.4. Strategic outlook

9.9.5. SWOT analysis

9.10. KeraMed, Inc.

9.10.1. Business overview

9.10.2. Financial data

9.10.3. Product landscape

9.10.4. Strategic outlook

9.10.5. SWOT analysis

9.11. Massachusetts Eye and Ear

9.11.1. Business overview

9.11.2. Financial data

9.11.3. Product landscape

9.11.4. Strategic outlook

9.11.5. SWOT analysis
 

Data Tables

TABLE 1    Corneal implants industry 360º synopsis, 2014 – 2025

TABLE 2    Corneal implants market, 2014 – 2025 (USD Million)

TABLE 3    Corneal implants market, by tissue type, 2014 – 2025 (USD Million)

TABLE 4    Corneal implants, by transplant type, 2014 – 2025 (USD Million)

TABLE 5    Corneal implants, by condition, 2014 – 2025 (USD Million)

TABLE 6    Corneal implants market, by end-use, 2014 – 2025 (USD Million)

TABLE 7    Corneal implants market, by region, 2014 – 2025 (USD Million)

TABLE 8    Industry impact forces

TABLE 9    Human donor market size, by region, 2014 – 2025 (USD Million)

TABLE 10    Artificial cornea market size, by region, 2014 – 2025 (USD Million)

TABLE 11    Anterior lamellar keratoplasty market size, by region, 2014 – 2025 (USD Million)

TABLE 12    Endothelial lamellar keratoplasty market size, by region, 2014 – 2025 (USD Million)

TABLE 13    Penetrating keratoplasty market size, by region, 2014 – 2025 (USD Million)

TABLE 14    Others market size, by region, 2014 – 2025 (USD Million)

TABLE 15    Fungal keratitis market size, by region, 2014 – 2025 (USD Million)

TABLE 16    Fuchs' dystrophy market size, by region, 2014 – 2025 (USD Million)

TABLE 17    Keratoconus market size, by region, 2014 – 2025 (USD Million)

TABLE 18    Others market size, by region, 2014 – 2025 (USD Million)

TABLE 19    Hospitals market size, by region, 2014 – 2025 (USD Million)

TABLE 20    Eye clinics market size, by region, 2014 – 2025 (USD Million)

TABLE 21    Ambulatory surgical centers market size, by region, 2014 – 2025 (USD Million)

TABLE 22    North America corneal implants size, by country, 2014 – 2025 (USD Million)

TABLE 23    North America corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 24    North America corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 25    North America corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 26    North America corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 27    U.S. corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 28    U.S. corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 29    U.S. corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 30    U.S. corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 31    Canada corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 32    Canada corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 33    Canada corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 34    Canada corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 35    Europe corneal implants size, by country, 2014 – 2025 (USD Million)

TABLE 36    Europe corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 37    Europe corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 38    Europe corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 39    Europe corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 40    Germany corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 41    Germany corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 42    Germany corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 43    Germany corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 44    UK corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 45    UK corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 46    UK corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 47    UK corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 48    France corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 49    France corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 50    France corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 51    France corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 52    Italy corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 53    Italy corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 54    Italy corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 55    Italy corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 56    Spain corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 57    Spain corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 58    Spain corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 59    Spain corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 60    Asia Pacific corneal implants size, by country, 2014 – 2025 (USD Million)

TABLE 61    Asia Pacific corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 62    Asia Pacific corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 63    Asia Pacific corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 64    Asia Pacific corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 65    China corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 66    China corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 67    China corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 68    China corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 69    India corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 70    India corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 71    India corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 72    India corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 73    Japan corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 74    Japan corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 75    Japan corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 76    Japan corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 77    Australia corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 78    Australia corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 79    Australia corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 80    Australia corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 81    South Korea corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 82    South Korea corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 83    South Korea corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 84    South Korea corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 85    Latin America corneal implants size, by country, 2014 – 2025 (USD Million)

TABLE 86    Latin America corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 87    Latin America corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 88    Latin America corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 89    Latin America corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 90    Brazil corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 91    Brazil corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 92    Brazil corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 93    Brazil corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 94    Mexico corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 95    Mexico corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 96    Mexico corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 97    Mexico corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 98    Argentina corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 99    Argentina corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 100    Argentina corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 101    Argentina corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 102    MEA corneal implants size, by country, 2014 – 2025 (USD Million)

TABLE 103    MEA corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 104    MEA corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 105    MEA corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 106    MEA corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 107    South Africa corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 108    South Africa corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 109    South Africa corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 110    South Africa corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 111    Saudi Arabia corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 112    Saudi Arabia corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 113    Saudi Arabia corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 114    Saudi Arabia corneal implants size, by end-use, 2014 – 2025 (USD Million)

TABLE 115    UAE corneal implants size, by tissue type, 2014 – 2025 (USD Million)

TABLE 116    UAE corneal implants size, by transplant type, 2014 – 2025 (USD Million)

TABLE 117    UAE corneal implants size, by condition, 2014 – 2025 (USD Million)

TABLE 118    UAE corneal implants size, by end-use, 2014 – 2025 (USD Million)
 

Charts & Figures

FIG. 1    Industry segmentation

FIG. 2    Global corneal implants market, 2014 - 2025  (USD Million)

FIG. 3    Growth potential analysis, by tissue type

FIG. 4    Growth potential analysis, by transplant type

FIG. 5    Growth potential analysis, by condition

FIG. 6    Growth potential analysis, by end-use

FIG. 7    Porter’s analysis

FIG. 8    Company market share analysis, 2017

FIG. 9    Strategy dashboard

FIG. 10    PESTEL Analysis