BLCO Bausch plus Lomb Corporation

Exhibit 23.1

Consent of Independent Auditors

We consent to the incorporation by reference in the registration statements on Form S-3 (No. 333-273618), Form S-8 (333-264728) and Form S-8 (333-273621) of Bausch + Lomb Corporation of our report dated August 30, 2023, with respect to the abbreviated financial statements related to the worldwide rights to Xiidra^®, AcuStream, SAF312, and OJL332 (collectively, “the Assets”) of Novartis Group (“Novartis”), which report appears in the Form 8-K of Bausch + Lomb Corporation dated September 6, 2023.

/s/ KPMG AG

Basel, Switzerland

November 13, 2023

Exhibit 99.3

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

On June 30, 2023, a wholly owned subsidiary of Bausch + Lomb Corporation (the “Company,” “Bausch + Lomb” or “B+L”), Bausch + Lomb Ireland Limited (“Buyer”), entered into a Stock and Asset Purchase Agreement (as amended, modified or supplemented, the “Acquisition Agreement”) with Novartis Pharma AG and Novartis Finance Corporation (together with Novartis Pharma AG, “Novartis”) and, solely for purposes of guaranteeing certain obligations of Buyer under the Acquisition Agreement, Bausch + Lomb. On September 29, 2023, under the terms of the Acquisition Agreement, the Company, through its subsidiary, completed the acquisition of XIIDRA^® (lifitegrast ophthalmic solution) and certain other ophthalmology assets and assumed certain liabilities from Novartis related to Novartis’s front-of-eye ophthalmology assets (collectively, the “Acquired Assets” or the “Acquisition”) for: (i) an up-front cash payment of $1,750 million, (ii) potential milestone payments of up to $475 million in cash payable upon the achievement of specified commercialization and sales milestones for certain pipeline products included in the Acquired Assets, (iii) potential milestone payments of up to $275 million in cash payable upon the achievement of specified sales milestones for XIIDRA^® and (iv) the assumption of certain pre-existing milestone payments and other obligations associated with certain Acquired Assets.

On June 30, 2023, the Company obtained commitments in respect of a $1,750 million 364-day bridge facility (the “Bridge Facility”), the proceeds of which, if such Bridge Facility were utilized, would have been used to finance all or a portion of the Acquisition (including related costs). In lieu of incurring indebtedness under the Bridge Facility, on September 29, 2023, the Company incurred $1,900 million in aggregate principal amount of indebtedness, consisting of: (i) $1,400 million aggregate principal amount of 8.375% Senior Secured Notes due October 2028 (the “October 2028 Secured Notes”) and (ii) $500 million in principal amount of new term B loans with a five-year term to maturity (the “September 2028 Term Facility”). Borrowings under the September 2028 Term Facility, together with a portion of the October 2028 Secured Notes, were used in connection with the Acquisition and, effective September 29, 2023, the Bridge Facility was canceled (together, the “Financing Transactions”). See Note 4—“Financing Transactions Pro Forma Adjustments” for additional details.

The unaudited pro forma condensed combined balance sheet at June 30, 2023, and the unaudited pro forma condensed combined statements of operations for the six months ended June 30, 2023 and for the year ended December 31, 2022, have been prepared in accordance with Article 11 of Regulation S-X and are presented to give effect to transaction accounting adjustments, for the:

The unaudited pro forma condensed combined financial information is based upon available information and certain assumptions that the Company believes are reasonable. The unaudited pro forma condensed combined financial information has been developed from and should be read in conjunction with: (i) the unaudited interim condensed consolidated financial statements of the Company as of and for the six months ended June 30, 2023, (ii) the unaudited interim abbreviated financial statements of the Acquired Assets as of and for the six months ended June 30, 2023, (iii) the audited consolidated financial statements of the Company as of and for the year ended December 31, 2022 and (iv) the audited abbreviated financial statements of the Acquired Assets as of and for the year ended December 31, 2022.

The unaudited pro forma combined financial information is provided for illustrative purposes only and does not purport to represent what the actual combined results of operations or the combined financial position of the combined Company would have been had the Acquisition and Financing Transactions occurred on the dates assumed, nor are they necessarily indicative of future combined results of operations or combined financial position.

The unaudited pro forma combined financial information does not reflect any adjustment for costs of, or related liabilities for, any integration and similar activities, or benefits, including potential synergies that may be derived in future periods, from the Acquisition.

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BAUSCH + LOMB CORPORATION

UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET

AS OF JUNE 30, 2023

(in millions, except share amounts)

See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial Information

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BAUSCH + LOMB CORPORATION

UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS

SIX MONTHS ENDED JUNE 30, 2023

(in millions, except per share amounts)

See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial Information

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BAUSCH + LOMB CORPORATION

UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS

YEAR ENDED DECEMBER 31, 2022

(in millions, except per share amounts)

See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial Information

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BAUSCH + LOMB CORPORATION

NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

Note 1 - Basis of Presentation

The unaudited pro forma condensed combined balance sheet gives effect to the Acquisition and Financing Transactions as if they had been consummated on June 30, 2023 and includes estimated transaction accounting adjustments for the preliminary valuations of assets acquired and liabilities assumed. These adjustments are subject to further revision as additional information becomes available and additional analyses are performed. The unaudited pro forma condensed combined statements of operations give effect to the Acquisition and Financing Transactions as if they had been consummated on January 1, 2022, the beginning of the earliest period presented.

The Acquisition has been accounted for using the acquisition method of accounting pursuant to the provisions of Accounting Standards Codification Topic 805, Business Combinations. Accordingly, consideration given by Bausch + Lomb to complete the Acquisition has been allocated to the assets and liabilities of the Acquired Assets based upon their estimated fair values as of the date of the Acquisition. As of the date hereof, the valuation of the assets acquired and liabilities assumed, as part of the Acquisition, has not yet been finalized. The fair value estimates for the assets acquired and liabilities assumed are based upon preliminary valuations. The Company will finalize these amounts no later than one year from the acquisition date. The preliminary pro forma adjustments have been made solely for the purpose of providing the unaudited pro forma condensed combined financial information. Increases or decreases in the fair value of relevant balance sheet amounts will result in adjustments to the balance sheet and/or statements of operations until the allocation of acquisition consideration is finalized. There can be no assurance that such finalization will not result in material changes.

The Company’s financial statements have been prepared in accordance with US Generally Accepted Accounting Principles (“US GAAP”) and the financial statements of the Acquired Assets have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board, including interpretations issued by the IFRS Interpretations Committee. The Company performed an IFRS to US GAAP assessment and noted no material differences for the purposes of pro forma financial information.

The estimated income tax impacts of the pre-tax adjustments that are reflected in the unaudited condensed combined pro forma financial information are calculated using an estimated blended statutory rate, which is based on preliminary assumptions related to the jurisdictions in which the income (expense) adjustments will be recorded. The estimated blended statutory rate and the effective tax rate of the combined company could be significantly different depending on the post-transaction activities and geographical mix of profit before taxes.

The unaudited pro forma condensed combined balance sheet has been adjusted to reflect the preliminary allocation of the estimated acquisition consideration to identifiable net assets acquired and the excess to goodwill. The allocation of the estimated acquisition consideration in the unaudited pro forma condensed combined financial information is based upon estimated aggregate acquisition consideration of approximately $1,753 million which is calculated as follows (in millions):

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The table below represents a preliminary allocation of the total consideration to the assets acquired and liabilities assumed based on the Company’s preliminary estimate of their respective fair values (in millions):

See Note 3 for further details on these metrics.

Note 2 - Reclassifications

The unaudited combined pro forma financial information has been adjusted to reflect certain reclassifications from the presentation in the Acquired Assets abbreviated financial statements to conform to the Company’s financial statement presentation.

2(a) Certain reclassifications have been made to the historical presentation of the Acquired Assets in the “Acquired Assets Historical Adjusted” column in the unaudited condensed combined pro forma balance sheet as of June 30, 2023 to conform to the financial statement presentation of the Company as indicated in the table below (in millions):

2(b) Certain reclassifications have been made to the historical presentation of the Acquired Assets in the “Acquired Assets Historical Adjusted” column in the unaudited condensed combined pro forma statements of operations for the six months ended as of June 30, 2023 and the year ended December 31, 2022 to conform to the financial statement presentation of the Company as indicated in the table below (in millions):

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Note 3 - Transaction Accounting Pro Forma Adjustments

3(a) Reflects the adjustment of historical intangible assets acquired by the Company to their estimated fair values. As part of the preliminary valuation analysis, the Company identified intangible assets for: (i) product brands related to the developed technology of XIIDRA^® (“Product Brands”) and (ii) acquired in-process research and development (“Acquired IPR&D”) related to a certain other ophthalmology asset. The fair value of the identifiable intangible assets is determined primarily using the “income approach,” which requires a forecast of all of the expected future cash flows. The final purchase price allocations may result in different allocations for the intangible assets as well as differences in the estimated remaining useful life than those presented in the unaudited pro forma condensed combined financial information, and those differences could be material.

The Intangible assets acquired, as well as the estimated useful life consist of the following (in millions):

3(b) Goodwill is calculated as the difference between the fair value of the preliminary aggregate purchase consideration and the values assigned to the identifiable tangible and intangible assets acquired and liabilities assumed. Goodwill represents the workforce acquired, as well as future operating efficiencies and cost savings. The amount of goodwill presented in the table in Note 1 reflects the estimated goodwill as a result of the Acquisition. The actual amount of goodwill will depend upon the final determination of the fair value of the assets acquired and liabilities assumed and may differ materially from this preliminary determination.

3(c) Represents the terms of an interim contract to purchase inventory, as embedded within the agreements associated with the Acquisition. The interim contract asset will be released to Cost of goods sold (excluding amortization and impairments of intangible assets) as the Company sells inventory acquired from Novartis. The balance of this interim contract will be fully released to the Statements of Operations over an assumed inventory turnover cycle of approximately two years.

3(d) Represents the: (i) $1,750 million cash payment made for the purchase price of the Acquired Assets and (ii) estimated remaining transaction-related costs associated with the Acquisition of approximately $14 million, which primarily includes fees for representation and warranty insurance premiums and legal and professional accounting services. Does not include costs associated with the Financing Transactions. See Note 4 below.

3(e) Represents the estimated transaction-related costs associated with the Acquisition, which primarily include fees paid for representation and warranty insurance premiums and legal and professional accounting services. Does not include costs associated with the Financing Transactions. See Note 4 below.

3(f) Represents the adjustments to contingent consideration to record: (i) a reduction of $3 million to adjust the historical value of assumed obligations of $34 million to their current estimated fair value of $31 million offset by (ii) an additional $3 million for new amounts incurred in connection with the Acquisition, which may become due upon achievement of future milestones.

3(g) Represents the adjustment to record cost of goods sold (excluding amortization and impairments of intangible assets) as the Company sells inventory acquired from Novartis, related to the interim contract as disclosed in Note 3(c). The $167 million balance of this interim contract will be fully released to the Statements of Operations over an assumed inventory turnover cycle of approximately two years.

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3(h) Represents the adjustments to record: (i) the elimination of historical amortization expense and (ii) recognition of new amortization expense related to the identified intangible asset, as follows (in millions):

The acquired Product brands intangible asset recognized in the Acquisition will be amortized on a straight line basis over a useful life of 8.75 years. The estimated intangible asset fair value, estimated useful life and estimated amortization expense may differ materially from this preliminary determination as the Company finalizes its valuation of the assets acquired and liabilities assumed.

3(i) Represents the adjustments to record: (i) the elimination of the historical impairment of goodwill, (ii) the elimination of the historical impairment of intangible assets, (iii) the elimination of the historical fair value remeasurements and accretion expense related to contingent consideration, (iv) the accretion expense for both the new and assumed contingent consideration and (v) the estimated transaction-related costs associated with the Acquisition which primarily include fees for representation and warranty insurance premiums and legal and professional accounting services, as follows (in millions):

The transaction-related costs will not affect the Company’s Combined Statement of Operations beyond twelve months after the acquisition date. Transaction-related costs related to this transaction included within the B+L historical consolidated statement of operations were not material for the periods presented.

3(j) Represents the income tax effect, using the Company’s Ireland statutory rate of 12.5%, for: (i) the Acquired Assets historical income before taxes and (ii) the above pro forma transaction accounting adjustments.

Note 4 - Financing Transactions Pro Forma Adjustments

4(a) In conjunction with the acquisition of the Acquired Assets, the Company incurred $1,865 million of net indebtedness ($1,900 million in aggregate principal amount, related to the September 2028 Term Facility and October 2028 Secured Notes, less $35 million of related debt issuance costs), which was used in part for: (i) the $1,750 million of cash consideration of the Acquisition, (ii) the estimated remaining transaction-related costs associated with the Acquisition of approximately $14 million, which primarily include fees for representation and warranty insurance premiums and legal and professional accounting services and (iii) approximately $16 million of Bridge Facility commitment costs. Additionally, the September 2028 Term Facility of $500 million requires mandatory amortization payments of 1% or $5 million per year, which is classified as Current portion of long-term debt.

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4(b) Represents the net increase in interest expense related to the Financing Transactions based on: (i) a weighted average interest rate on the debt of approximately 8.6%, (ii) amortization of deferred issuance costs and (iii) $16 million of Bridge Facility commitment costs (which will not affect the Company’s combined statement of operations beyond twelve months after the acquisition date). Annual estimated amortization of deferred issuance costs (which include fees associated with the September 2028 Term Facility and the October 2028 Secured Notes) over each of the next five years is approximately $7 million. A 0.125% change to the annual interest rate would change annual interest expense by approximately $1 million.

4(c) Represents the income tax effect for the above financing transaction adjustments, using the Company’s Ireland statutory rate of 12.5% for the deductible portion of the debt which was subsequently lent to the Company’s Irish entity to facilitate the acquisition. The portion of the Financing Transactions not subsequently lent to the Company’s Irish entity remains at the Company’s Canadian entity, however there is no tax effect for the adjustments related to the debt within the Canadian entity, as this entity has a full valuation allowance.

Non-GAAP Financial Measures and Ratios

The information under the heading “Combined Pro Forma” has been prepared in accordance with Article 11 of Regulation S-X. Solely for Canadian securities law purposes, the information appearing under the heading “Combined Pro Forma” of this exhibit may be considered non-GAAP financial measures and non-GAAP ratios as defined by National Instrument 52-112—Non-GAAP and Other Financial Measures Disclosure, per the Canadian Securities Administrators. Management uses these pro forma financial measures and ratios to help analyze the impact of the Acquisition and the Financing Transactions and believes these financial measures and ratios are useful to investors in their assessment of our operating performance, understanding our ability to service our debt and the impact of the Acquisition and Financing Transactions.

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